They are not against Israel per se, but they are radical in support of the 2 State Solution, for Peace and equal rights for Palastinians and Israelis, they are against racist injustice which Palastinians have to live with by an occupying power, full of racist hatred.
They are United with many Nations and most people in the World that this injustice and racist denying of Palastinian rights, must end immediatly.
The USA is against the will of the World and Vetoes the Worlds demand for ending this racist slaughter of Palastinians!
It’s is not the right of Israel to exist in question, it is the right to exist for Palastinians and their human rights, which unite them all over the World except from the USA, which is disconnected to the World and lost all sense of human rights for Palastinians.