The US military-industrial complex does not need you to defend it.

It might well be more complex than that, but you have every right to demand from your government to put its vast resources to use in order to tackle that complexity. Given the severity of the situation, I'd say you have a responsibility to.

Seeing such a tragedy unfold and going 'oh, my government probably has a good reason to keep funding the active genocide, I'd hate to give some extra paperwork to our bureaucrats by making a fuss!' is very defeatist, to put it politely.