The media and politicians ignored multiple mass murders because it didn't fit the narrative. They're using this story to blame their political opposition and to push for new regulations. It is important to read the manifesto and understand the shooter, because otherwise they'll do it for you, and the reality blows up their narratives. It's why they go to such lengths to remove the manifestos and other inconvenient information from the web, along with the websites and freedoms they blame. They also use it to remove any realizations or political movements.
They labelled Jan 6 as insurrection and terrorism and cowed the right from large gatherings (aside from Trump rallys) for some time. Now they're focusing on presenting anyone who is aware of the UN's "replacement migration" as a terrorist.
The media and politicians ignored multiple mass murders because it didn't fit the narrative. They're using this story to blame their political opposition and to push for new regulations. It is important to read the manifesto and understand the shooter, because otherwise they'll do it for you, and the reality blows up their narratives. It's why they go to such lengths to remove the manifestos and other inconvenient information from the web, along with the websites and freedoms they blame.