Other ads get warning labels, identifying there are risks associated with a product. Let Google, at worst, label an ad as objectionable, to warn its users, but not to deny them complete access to such ads.
You cannot suppress thoughts and views, but you can protest them with facts, figures, and better ideas and views. We should never muzzle free speech. We should let it flow freely and then meet it on the proper playground. That could be a public arena, social media, books, speeches, in a classroom, the media, the courts, or a political movement. We have the power to pursue -- and the responsibility to let all views be stated. We should encourage support for the views we believe are more legitimate and useful, but we cannot disallow for the minority viewpoint to be heard.
We all win when we weigh all ideas and champion some while carefully and thoughtfully dismissing the rest. But silencing a thought before it is expressed silences us in ways we should not tolerate.