I know what you're referring to, but this is not how the word "antisemitism" works. The word antisemitism was derived from pseudoscientific racial theory that called Jews "Semites" because the thought that Hebrew were semitic people and Jews were the worst within semitic people. https://en.wikipedia.org/wiki/Semitic_people#Antisemitism
This is discrimination, the people of Israel are not their government. You wouldn't punish Russians for Putin's actions. And it will definitely not help a single Palestinian.