Why are they so fixated on despising Whites because of muh colonialism, muh racism, and muh White privilege that they would have to resort to blame Whites for what kikes in Israel are doing?

It's a product of postmodern Cultural Marxism, which is usually known as SJWism in normalfag circles. They're basically so bad, not even some liberals and some modern commies like them. They're not even hiding the fact that they want White genocide. However, they do seem to be just merely paper tigers at times. The reason why you think they are being arrogant and ignorant on many certain things is because they have massive amounts of inferiority complexes that they can never conquer. Remember that SJW book known as "White Fragility"? It reeks of pure projection and virtue signalling. They're incapable of feeling truly superior to their enemies, because they always feel the need to complain about how "oppressed" they are or how they're being "harassed and attacked" by mere words on the internet. Free speech only matters when they want to say things, it's not free speech when other political views want to have a say. Instead it's "hate speech", they're practically Bizarro neocons.