Remember when he kicked the Russian embassy staff out of the country at Christmas, making them stand on the tarmac because they weren't allowed in the terminal?
And then to add insult to injury, or actually injury to injury, the US stole a piece of property the Russians used for events and occasions.
The unprecedented joining of the anti-war left and the anti-war right on Friday is bound to turn the Biden staff (mostly the same people as in 2016) into raving madmen, ready to do any atrocity to provoke a Russian reaction and an excuse to escalate before the election, in an attempt to rally Americans around the flag.
Americans are conditioned to support every new US war, at least at the beginning, so expect Crazy Nuke Country to start throwing some wild punches and nasty provocations. And not just in Ukraine.