They need to hear, as well, the fact that being anti-Israel or anti-Zionist is much too often used as a screen to put forth views that are antisemitic.
This includes when Israel is singled out in discriminatory fashion, held to a standard of perfect conduct, while actors much worse are held to no basic standard at all.
Thanks to Pat Condell for painting the picture, in spoken words, of amorality from people that pretend to be the opposite.