If US loses half a billion in European countries that are by far the most aligned with US view on how to run world and who should do it, suddenly it will be just US, Australia, New Zealand and... maybe few small states against russia and China. Nobody else, some 6?% of global population. Also its extremely rich continent when compared to the rest.
Ie most of Africa already currently is anti-US (and anti-european) if you didnt notice and welcoming China and russia like long lost brothers, and its progressing.
If US will give us big FU, we will manage russian expansionism on our own, with heavy losses, eventually, despite mostly pathetic leadership (ie germans really know how to put clueless folks sabotaging their own countries into leadership). But we wont ever be friends like we are now.
Magas or similar fringe folks need to put together way more coherent arguments than these, since they dont make any sense from any rational point of view, even if completely US-centric and selfish.