Like WHAT THE ACTUAL FUCK IS WRONG WITH YOU AND CAN IT BE RESOLVED WITHOUT RESORTING TO THE 
CUCK PIT? Don't let the "Perfect" (not committing genocide) be the enemy of the "Good" (LITERALLY FUCKING GENOCIDE).
What the entire fuck is wrong with them? It's not just how could they do this, but how can they not see what they've become? Their whole fucking ideology is built around the idea that they're the good guys, the defenders of civil rights, the beacon of an enlightened, refined, civilized society. That's their whole goddamn thing, but now they've compromised and lesser eviled their way in to virulent, active support for fucking genocide WHAT THE FUCKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK!?!?>!>?!!:!>
And, and, all the fucking bullshit, for decades, about tankies being irredeemably evil because of genocides that didn't even fucking happen?
FUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUCK
They're white supremacists. There is no nuance mongering on their part there. It's just indifference. Voting, a ritual, is their only tool they can and are willing to use as political agency. They're comfortable leading their lives of privilege and safety because they will not be bothered by Trump's policies or Biden's genocide.
You should take comfort in the fact that most Americans do perceive this as genocide and want an arms embargo on Israel. What rhetoric you are getting upset at is just the politically impotent bargaining their impotence by berating you for not imbuing voting with godlike importance.
The definition is right there: supremacy. That means all-encompassing and being the default. What's insidious is how thorough it is in becoming acceptable thought. Unless you actively resist white supremacy mentally and physically, you become its bearer. Even the most """progressive""" whites will accept it, especially if it's foreigners on the receiving end.
White privilege is born from the total supremacy of whiteness. Destroying that supremacy means giving up that privilege. It's not something most whites are willing to do when push comes to shove.