I can't see how that comment by Barry about how Hitler would be pleased at what's been happening is anti-semitic. If someone hate Jews, they surely want other people to hate them, and that means they welcome it when they behave in a way that tends to make other people hate them.
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It's a dirty war, but it's certainly not "ethnic cleansing" or systematic extermination.   Not "systematic extermination" certainly - but the state of Israel as it exists today is founded on ethnic cleansing. That is why the demand for a right of return for exiled Palestinians is seen as incompatible with the right of Israel to exist.

The population of Gaza is overwhelmingly made up of people living in exile from Israel because of their ethnicity.