Interesting that you read what I wrote as calling someone a "racist sexist homophobe", when what I wrote about racism, sexism, and homophobia, was specifically and emphatically about language and behavior, and made no mention of people. The people in question aren't what I have a problem with, only the language and behavior that contributes to social norms in some communities on the Internet that are exclusionary of women, people of color, and LGBTQ folks.
The only thing I said that was about people was "mostly said by angry young white dudes on the Internet". Which was, in fact, intended to be dismissive of some people's words. I believe it is a boringly predictable and reactionary display of privilege that deserves nothing other than to be dismissed. It is not merely coincidence that it is almost universally angry young white men who make these kinds of statements.
Note that one side of this debate presumes semantic-semiotic equivalence (that any discussion of a subject X will come with the same connotations) while the other side presumes linguistic relativism (that you can talk about X using word Y or word Z, and the connotations are attached to the words, not the subject.)
"Political correctness" (and the concept of a "trigger warning", and a few other things) is only a coherent concept under the assumptions of linguistic relativism. Since the two sides have different axioms, they can't really engage in a debate.
The only thing I said that was about people was "mostly said by angry young white dudes on the Internet". Which was, in fact, intended to be dismissive of some people's words. I believe it is a boringly predictable and reactionary display of privilege that deserves nothing other than to be dismissed. It is not merely coincidence that it is almost universally angry young white men who make these kinds of statements.