Russia probably has strong kompromats on Trump and his administration. Can't explain it any other way. Why otherwise they would go out of the way to make idiots of themselves in public in front of the whole world? I know Trump has not been an example of tact but this is something else.
I'd love to have some idea of what they could actually have that he'd be ashamed of, but he's so shameless it's hard for me to imagine. Which makes me more inclined to think that he just hasn't met a dictator that he's not jealous of more so than anything.