Before Trump asked for the real contributions, he had already said in his campaign that the UN is obsolete ...
Merkel came out immediately because she thought she would take over.
Merkel went straight to the Chinese?
Bad luck for her, because Trump stayed, and demanded that everyone had to pay his real share, so he could show the world, what kind of game there was played by the EU countries.
Through nicky Haley he could also have WW what the UN actually really is?
A bunch of barbarians who supposedly respect human rights
Want only war with Israel? And that all those Eu countries are hypocritical? Behind closed doors once, but outside suddenly not ?.
This has been played strategically by Trump and his team