And yes, many of those countries did some minor allying with Germany during WWII, often grudgingly, but this was because they feared Stalin more than Hitler, because they remembered their bad history with Russia but Germany was an unknown.
Define "minor allying". Czechoslovakia was an industry powerhouse for the Nazis manufacturing a big chunk of German weaponry. Bulgaria, Romania, Hungary and others were supplying troops by the hundreds of thousands. I don't think they did so grudgingly, more like they had no other choice having been in the German zone of control.
(ie, the Tatars were kicked out of Crimea as punishment for alleged collaboration with Nazis)
One may argue whether such large scale deportation was an adequate response to that (adequate by the 1944 standards, not modern day standards. USSR was still at war then) , but the Tatar collaboration is well documented and is not alleged in any way.