I really was wondering about Western European school indoctrination though

They don't explicitly claim that the east front doesn't matter, and probably mention at some point that it was significant. But most of the time is spent on the west front, because the biggest goal of the teaching of WWII is to make students able to discuss how "the West" reacted to the nazis.

does the EU mandate some sort of common requirements for grade school programs

There are standards, but they are mostly formalisms. As in, if two programs follow the standards, then you can compare them, but just knowing that they comply with the standards does not tell you anything about the content of the courses.