The reason liberals become teachers and social workers is because other occupations are not as accepting towards people who live in the fantasy world of political correctness and non-factual thinking .
That's kind of a crazy take on things, why would you make fun of liberals? I'm kind of shocked by this.
They refuse to accept the truth and have extreme political correctness
Lots of people have extreme views on the left and the right and you bashing the left for it's correctness is misplaced. See the "correctness" on both sides of the aisle and try to find ways to bring things together not separate them out with disparagement.
I also wanted to become a professor and make a difference in something
Well then you should go be a professor, but you'll need to be more open minded and not dislike all liberals. They're not all too politically correct and some people would take unkindly to your opinion on that.