Problem is they will disappear, jail, or kill any genuine organizers

Problem is they are already doing this regardless of if your an organizer or not. If the regime decides you're a target, then you're fucked. So might as well start organizing to defend against those who actively wish to do you and yours harm.

and infiltrate / sabotage any organization that actually gets to a place of effectively mobilizing a strategy like this

This is why organizations need to practice good OpSec in order to prevent infiltration.

People need to protect and organize themselves. Thats what the black panthers did and that’s precisely why they were so effective. They built up from their preexisting communities.

Yea, and part of what the Black Panthers did in their organizing was to provide armed security for protests, among a plethora of other mutual aid programs.

Those problems have existed for every single revolutionary effort to exist across history. That didn't stop them and it shouldn't stop us either.