Antifa is Marxist, anti-Capitalism, and Anarchist.  Anti-Israel is probably just a byproduct of that type of thinking but as far as I can see not a main part of their ideology, such as it is.  I certainly cannot imagine any of them being big supporters of Israel but maybe they are out there.  The anti-racism stuff is not their main cause but a part of the rhetoric thrown around to justify their violence towards anyone that disagrees with them, along with calling them Nazis, Fascists, KKK, etc. whether they are or not.  Notice the Soviet flag and other symbols Antifa carries around here and in Europe and what they say in their websites and you quickly get who they are.  They have been around a while.  There is a reason they cover their faces and attack anyone including the news media who take their pictures or film them even though they are in public spaces and anyone has a right to do so. Simply put they are a fringe element of violent extremists, not the good guys.