Saying Katy is not an artist is not "bashing" her or "spreading hate." It's simply stating an opinion. Don't you think we have a right to say what we think even if it might not be popular? Katy is not an average citizen, she is a public figure. As long as what is said is not hurting anyone, what's the big deal?
When we bring attention to these "unpopular" comments, that's when the real negativity and hate happens.