As an addendum to MtheGM's post I should point out to those who direct their their venom at Zionism or the "state of Israel" that many both within and without the Jewish community consider that tantamount to antisemitism. From Wiki:

New antisemitism is the concept that a new form of antisemitism has developed in the late 20th and early 21st centuries, emanating simultaneously from the far-left, radical Islam, and the far-right, and tending to manifest itself as opposition to Zionism and the State of Israel. The concept generally posits that much of what purports to be criticism of Israel by various individuals and world bodies, is, in fact, tantamount to demonization, and that, together with an alleged international resurgence of attacks on Jews and Jewish symbols, and an increased acceptance of antisemitic beliefs in public discourse, such demonization represents an evolution in the appearance of antisemitic beliefs.