Clearly you don't understand the difference to "people responding to a serious and systematic injustice" and "people trying to harass others until they commit suicide."

Consider developing some sort of moral or ethical sense.

Oh, and there is no official "Black Lives Matter" site. Someone registered one after the fact, but they have no official standing or really do much of anything.

Looting and burning down the family owned corner store was an amazing moment of restorative justice. We need to fight back against the 'systematic injustice' that uninsured small businesses have wrought onto marginalised communities. If you don't support looting, murder and arson then you lack a moral compass.

Your example makes no sense, BLM does not directly or indirectly endorse nor is affiliated with groups that endorse rioting in fact you had people in BLM telling people not to riot.

Kiwifarms on the other hand do indirectly endorse harassment, swatting and doxxing. In fact you do have people on that forum working day and night to dox people of interest.

A much better example would be: Reddit, with it indirectly supporting radical left wing causes, because they haven't been as active banning those hateful communities.