Agreed. The institutional resistance isn't strong enough for a real civil war. You would have to see actual defection among military, government, or business leaders. I don't see that happening.
An insurgency is far more likely but it's unclear if it could succeed against the might of the US military and intelligence agencies.
I think neither of these is particularly desirable. If the regime wins they come out much stronger, emboldened and battle-hardened.
Instead, we should be doing everything we can to destroy the US economy. This will be much harder to respond to with overwhelming force, easier to enact in secret and in public, and have more or less the same effect as fighting a military conflict without the destruction of human life.