It's a common enough thing for people to be accused of anti-Semitism for criticizing the government of Israel. And it's not just arm-waving loonies who do it. Sometimes it's just normal people of various faiths and ethnic backgrounds who have been taught to believe that only anti-Semites would criticize the government of Israel. Denying that this is the case won't fix the situation. As with all generalizations about people, the only way to correct it is to educate people about it.