While, I agree with you synopsis on freedom of speech, I must first state that terms like diversity, racism, feminism and the like exist for vert good reasons. Not only was a certain group of people's right to speech inhibited, basic living amenities were denied. Free choice was denied.
Nonetheless, in each case what started as something pure was usually corrupted by selfishness, greed and sheer lack of logic in some cases. Then, in time, those who were victims become abusers themselves.
No one, no matter what their life experience was, has the right to tell another what they should or should not say. Everyone has the right to an opinion, right, wrong or anywhere in between. Note that does not been you should go out of your way to be disrespectful to anyone. Having an opinion doesn't mean forcing it down everyone's throat.
We just need to understand not everyone will share our views and accept it.
I don't have a problem with the terms themselves. What you stated there that I quoted is essentially the problem. We can also simply call it hypocrisy, but then sometimes it takes writing it out in long form. We never know what might reach someone.