No one banned Russian language

Is it not so? A new law requires any media outlet to publish in Ukrainian as well as Russian. New laws restrict Russian language instruction in schools. And they wonder why Russia gets mad...

Go and refresh your memory how Russia kept lying about not going to attack.

Not sure why this would shock you. Countries and politicians lie. I do recall an 'Iraq War'. I wonder whether the surprise was more beneficial or the perceived legitimacy that offering an ultimatum would have had.

And how people right here were mocking the Americans for publicising their plans in the hope of thwarting the aggression this way.

Not sure why you think Americans would want to oppose a war. If they opposed it, then they really thought Russia would win it quickly, because a long war at the cost of Ukrainian lives is only to the benefit of the imperialists.

If only America did more to thwart its own aggression. Libya and Syria have still not recovered from its mostly peaceful interventions.