A private business is a private business and they can set their rules as they please as long as it doesn't run afoul of laws (ADA in the states for example).
That you think there is some important distinction where Google loses rights that Ma and Pa's store has shows that you have nothing reasonable to offer.
Your argument about "worst of humanity" could equally apply to the best of humanity with free speech.
In fact...who are you to decide what is good speech and bad speech?