"Obviously, we need to ensure those Russians do not export their toxic culture to the rest of us."

Unfortunately thats exactly whats happening. Very small amount of russians actually assimilates into new socities. Most of the time they just want to enjoy quality of western life, while still having all the shitty beliefs of the russian culture. I knew a russian woman (she worked together with my mother), that had a great job in USA, she ran away from Russia cause she hated government... and she STILL excused Crimea annexation. Thats how fucked up they are. No matter what horrible things Putin would do, they would still support him just cause "its my country".

Russians are xenophobic af and nationalistic af. If you let them in, they will just shit on your head. Very small amount of russians in Germany are against the war. Very small amount of russians in USA are against the war. Most of them support it, they just don't want to be dying there.