I used to read non-stop daily trying to figure our what caused all of this in modernity that we live in when covid hit and this is what I came to after many books (some literally 1000+ pages long).

The facts are verifiable through leftist-approved history and alt-right accepts them as most probable also.

Facts:

• The Catholic Church allowing non-Whites including jewish converts to be Christian
• The Rothschild's manipulated the British stock market at the end of the Napoleonic Wars, which was a large part in why he became so wealthy while also drowning out the competition. They were never punished for this but today it likely would be illegal because of how obviously immoral it is and not in good faith.
• The Rothschild's had connections to the British monarchy because of the lending he made to the monarchy for the Napoleonic Wars and the fact the Rothschilds were relied on to pay soldiers during the war.
• The invention of the printing press
• The promotion of k-12 education through academic institutions
• The change from weapons being easily crafted cheaply by an individual to weapons requiring large quantity of resources requires from the second industrial revolution
• The promotion of anti-racism leading to non-White men being allowed to vote
• The promotion of feminism leading to women's suffrage
• The creation of central banking
• The promotion of income taxes and the welfare state
• Hitler losing WWII along with the peace treaties being signed at the conclusion of the war
• The promotion of Critical Theory that originated from the Frankfurt School
• The immigration act
• The civil rights act
• The promotion of neoliberalism

The above are the main facts that have contributed to where we are today.

The conjecture:

• Ashkenazi Jews gained considerable power over White society. At the height of the Rothchild's influence, it was remarked by many prominent people that the Rothschilds controlled the entire economy of Europe, whereas JP Morgan was given the same regard for the USA. With this influence, jews proceeded to advance their own interests which were not aligned with the interests of White people.
• Part of jewish interests are feminism (Ashkenazi jews are inherently a gynocratic society where the line of succession is based on the woman not the man which is unlike any White society. The esoteric reason for this is that jews are the remnants of a tribe that Whites were ordered by God to kill both the men and women but Whites kept the women alive and ended up procreating with them. The women always held a grudge and kept interbreeding as much among their own sons and daughters as to keep the line as pure as possible and now the existence of jews has been God's punishment to White people for not listening to him and this is why jews are inherently a feminine race). Jews promote these things without necessarily sitting around a round table and discussing the need to (though they do this also) because it's inherent in their nature (genetics) to want these things.
• With the printing press and centralization of knowledge (academic institutions) along with jewish power in finance and with European monarchies, it was easy for them to fill the minds of White people with what was in the interest of jews rather than Whites and essentially subvert White society from existing to secure the prosperity of Whites to existing to secure the prosperity of jews. It was exceptionally easy for the jews to infiltrate the Catholic Church and later the Protestant ones by converting then just promoting their own natural values/beliefs within Christianity and Christians had no defense.
• The significant jewish interest in banking realized with central banking they could gain leverage over most nations so they pushed this
• The advent of the welfare state was designed specifically to both increase government funding to repay higher loans to government, thus empowering the bankers while also appeasing the masses by giving them the bear minimum so they wouldn't revolt
• Individual White men likely realized what was going on but were powerless to stop it because of the change in weapons technology. Men were no longer able to easily rise up against government unlike in the American Revolution times.
• Hitler realized the jewish influence on everything and wanted to free his people of this. He was able to utilize government power and resource management to give White people a good shot at reestablishing dominance over their societies but he failed.
• After the war, the obvious topic on jewish minds was preventing White people from ever doing what they tried to do before and revenge. Much of the modern leftism can be chalked up to this. Prior to Hitler, the jews may have been content just siphoning all the wealth from Whites and keeping society serving them but after the war prominent jews switched to an "we need to oppress Whites and maybe even eradicate them so they never rise up" plan of action.
• Critical Theory was utilized as a weapon to oppress Whites
• Neoliberliam was used as a weapon to make all nations reliant on the jewish economic system without self-reliance and sovereignty
• The Civil Rights and Immigration acts were used to oppress and eradicate Whites
• Not all jews agree on how to treat Whites. Some jews think their wealth will decrease if Whites are eliminated and they need White slaves to improve their station while other jews and their allies think Whites are too big a threat to keep around. Some are in the middle believing that with the advances in AI surveillance (Palantir) that the threat of Whites rebelling against jewish dominance can be controlled and it's different than last time (this is where Trump/Vance's team stands). Of course, everyone's beliefs in the ruling elite slightly differ in these regards with some not even realizing they're supporting these pathways.

This is essentially where we stand today

The Catholic Church since its foundation has made errors that have now led to harming Whites but ultimately, I would say the beginning to the problems today truly begin from about ~1800 onward.