How come a semite can't disagree with israel without being called anti-semitic?

My bloodline is jewish. I'm atheist and I don't believe that israel is divine and I don't believe that their people need aid from the us anytime. I thihnk that the jewish should give the palestinians back their land taken from them by the UN in the 1948 and 1967 palestinian exoduses. How come you cannot disagree with the jes or israel at all without being called anti-semitic? Whats with this religious piety and exemption from scrutiny by christians and them imposing this emeption on the jews? My arents agree with me that israel is at times in the wrong, so why can't others admit it?