See Grizz
Not all liberals fall under the this banner, but there is a small portion of them that are so incapable of seeing anything contrary to their own hard wired black and white beliefs that they are simply unable to comprehend not only someone with a differing view from themselves but those who also believe differently from their perceived enemies.
I am pro abortion, pro drug legalization, pro prostitution, and pro pornography. You may ask why I am so often attacked by the left here. It is because I have never made any bones about my fiscally conservative views (that and I am really anti-warmer). That’s all he is capable of seeing, the word conservative. If he can’t pigeonhole me that means he can’t attack me, and liberals like him hate that.