Yeah, you could figure that Tanoomba is just a complete troll persona...
Or you could take his posts as holding a grain of truth of his personality, that he is a liberal english professor that holds very strong views on racism and sexism. Sometimes these views lead him astray into seeing it when it doesn't exist.
Just like I assume that Lumie is really a conspiracy nut irl, you are a biology major that loves to endlessly debate with people about science, and that Araysar is a pro-gun liberal from Chechnya with a tendency to see any disagreement as sign that the other person is a moron.