Can you be critical of Israel without being anti-Semitic? Sure. It is a question of both substance and style.
I recall John Gardner, then-Secretary of the U.S. Department of Health, Education, and Welfare (now Health and Human Services), saying back in the 1960s that when historians of the future looked back at that decade, they would say that higher education was caught in a “savage crossfire” between “unloving critics and uncritical lovers.”
The uncritical lovers were unwilling to face up to the problems and instead tended to smother the institutions in a protective embrace, protecting them from needed change. The unloving critics were skilled in the art of demolition and were willing to burn or otherwise destroy the institutions without giving a thought to replacement or rebuilding.
Israel deserves loving criticism and those who deliver it are by no means anti-Semitic. They are simply speaking the truth as they see it. This presupposes substance in the critique and civility in the style.