It's a combination of factors:
A lot of Europeans still hate gays and gypsies.
Many huge international media outlets are owned by Jews, and so they over-emphasize their own plight versus the plight of others.
Israel and the political atmosphere around it requires a greater concentration of coverage. "If you don't like Israel, it's just because you're literally Hitler!"
We constantly see people on the lookout for Fascism because it caused the Holocaust. We don't really see that same anti-communist and anti-socialist agenda, despite the latter two having a kill count that makes the Holocaust look like a theme park. This is, again, because of a very left-leaning media attempting to frame the narrative against their ideological enemies, rather than actual sympathy for atrocities.