Now we are getting to the root of the issue.
Google has become a de facto monopoly, and in my opinion they should be trust-busted.
If they are big enough to have de facto control over content, they are big enough to be trust busted.
We are not talking about one individual small company boycotting a website, we are talking about a Silicon Valley behemoth boycotting a website.
Actually, no. We're talking about thousands of companies who don't want their brands associated with certain content.
If the advertisers wanted their ads to run on sites with anti-Semitic content you can be sure Google wouldn't hesitate.
In this case Google's just doing what its customers, the advertisers, want.