A third party has literally no chance to win in our system, and nobody gives a single fuck about the miniscule amount of votes they do get - you're not moving any metrics, or sending any messages, or taking any stands. All you're doing is helping the worse option win.
So, if you truly hate Palestinians, then by all means vote Stein. If you want to see Ukraine taken over, then please vote Stein. If you want to see our country start murdering every version of queer people, then you really should vote Stein. That's all you're going to get for it.
Whether you like to see the truth or not, a vote for a third party is still a vote for genocide.