"Hate group" is a worthless political term. What on earth does it mean to assemble in a group to express a verboten emotion? And who defines it? The SPLC has been exposed so many times for its one sided outrage, political bias, and cries the sky is falling to get donations. 

Islamists have been putting terrorism videos including music videos up for years. Hamas, ISIS, Islamic Jihad, you name it. I've flagged more than I could count and they stay up. So do videos celebrating cop murder.