The sad thing is, the mocking and joking about Trump by our former friends and former allies is merely gallows humor.
They're stunned and worried about what has happened to America, they're still trying to warn us from their own experience, and it's now affecting them directly.
They laugh and they mock to stop worrying for a few moments. The most important country in the world has become a neofascist predator nation damn near overnight, and there's little they can do but detach as soon as they can.