That may be the case for some Russians (though for those living abroad? I'm not sure, there's a reason they're living abroad after all), but for Germans in Germ

That may be the case for some Russians (though for those living abroad? I'm not sure, there's a reason they're living abroad after all), but for Germans in Germany or Americans born and raised in the US? It seems to me that at least for these cases, it's more of an "the enemy of my enemy is my friend" thing. They've lost connection to the society around them and perceive it as hostile, so anything that the mainstream (or the government as the mainstream's enforcer) views negatively they automatically view in a more positive light. And since their enemy is always lying, they'll eat up anything that agrees with that position.