No, the OP's comment was much longer than four words, and part of it implied that if you're not PC then you're a jerk.
It's a lot easier to see the problem with the OPs comment if you think about what it means to be good, and how the definition of "being good" can vary so much between people.
If you want to talk with people about what being PC really is, you have to use fewer vague, high-level abstractions like "jerk" and "respect" and more concrete examples.
No, I'm saying that, in relation to any given topic, there are many acceptable viewpoints, and that you can't just shut down the discussion and outlaw the expression of opinions which differ from your own.
And that's what PC is: we're the nice guys; anyone who disagrees with us is engaging in hate speech; so let's just gag them and send them to Antarctica.
PC is essentially totalitarian. One point of view, no arguments.