The problem is not people criticizing ideas. The problem is people attacking other people for saying things they don't like, trying to get them fired, etc.

Attack their arguments, not their family, employer, etc.

I mean, you keep repeating the idea that "some people" shouldn't be allowed to use their speech but DHH can use his speech.

You can't have it both ways, either DHH is free to speak his mind on any subject he chooses, and so is everyone else, or nobody is actually free to speak.