The people causing the most strife in America isn't BLM and ANTIFA. Sure, they do the actual damage, but they are merely tools - and fairly dull tools, at that.
The real enemy are the journalists, politicians, academics, and woke corporate executives. Once they go away, there's no one left to motivate or logistically support BLM and ANTIFA.
They are also the "softest" element. They aren't fight to endure the strife that they instigate.
They are also hated by the minions they motivate. Seriously, we have seen stories of leftists getting caught up in the very mobs they support. It never goes well for them.
So, what would happen if things got really weird, and the Right decided - civil order having collapsed - went after the source of the strife rather than confronting BLM?
I'm not saying BLM isn't a piece of shit Marxist organization to be extinguished, it is and must be. But how much would it undercut the narrative driving the ill informed rank and file if the backlash from the Right fell on the rich white people leading the Left?