The language "trouble surviving the winter" plainly suggests massive numbers of Germans freezing to death, which isn't going to happen. Even if I grant that this claim is talking about damage to the German economy (I don't) it is unlikely that the German economy will collapse during this winter. The economic ramifications will be felt for many years to come but there is no chance of Germany ceasing to exist this winter as claimed above.
> And let’s not forget that economic harm inflicted from abroad is precisely what gave rise to WWII.
Fear of that sort of scenario should mostly be focused on Russia, who are going to lose a war as Germany lost WW1, and will be looking for scapegoats. Besides Russia, I can think of other countries which have suffered far more economic damage due to this war than Germany. Particularly, the one that actually got invaded. Germany's economy is still strong and healthy compared to Ukraine's.