your last take there is insane bro, GKMC is TPAB level writing, and MMATBS is also good and inspired a bunch of other artists to make more introspective music (like Tyler The Creator)
for your first point; again, i see your point, it is actions that lead to direct harm. however, ideas and actions are undoubtedly connected. one always leads to the other. calling for an entire ethnicity to be wiped out, is more than just "being edgy." normalizing any hatred, including anti-semitism, which has historically always led to much despair, is not easily forgiven. spreading those ideas, as a public figure that has many die-hard fans, leads to the harmful actions that you speak of.
in any case, my real standpoint is that both are bad. neither people who spread harmful ideas, nor people who physically do harm, should deserve your support if you have a consience.