How does a frequency cutoff filter out racist suggestions? Or were you referring to another sort of automatic cutoff?

NB. Interestingly, "christians are" and "atheists are" don't return any results either.

I suspect it would filter out much of what is offensive. But you need to try it and see.

"white people are stupid" (without quotes) has 218 million results. It's one of the suggestions that google (presumably) blocks. That's many more results than a lot of useful suggestions ("michael jackson songs" has 88 million).

It turns out "(race or religion or nationality) are" is blocked for most races, religions, and nationalities.