That's what politicians do, especially if they don't like the winner. Yeah of course Macron thinks trump is a petulant man child, but it doesn't make sense to needlessly antagonise people as unstable as trump.

It's like if you're walking down the road and see a crack head, you're not going to flip them off and call them a twat. Because A: they might attack you and B: having a reputation as someone who is easy to get along with is a good thing.