When a word or phrase use becomes common enough, it does become accurate. I feel confident that were you to do a search through these boards, the word liberal would be used the vast majority of the time to describe the political 'left' in the US. If you were to perform a poll of the country, I think that the majority would equate liberal with the political left.
Besides, no matter what political ideology liberal entails, it does not prevent the possibility someone can be a liberal and be close minded. Unless you are saying that open mindedness is a political ideology?
Of course personal traits have nothing to do with political ideology. That should be a no-brainer although that fallacy too is rampant around here ("Republicans are intolerant"; "Democrats are angry"; "the left/right/center is racist" etc). Again common use doesn't make it either honest or accurate.
I could bring back literally thousands of posts using
it's where
its is meant. Doesn't make that accurate either. All around us people use the expression "I could care less" when they mean the exact opposite. Common use does not make for accuracy and never will.
These misconceptions don't suddenly become fact just because a lot of people share the same error. "French toast" is unknown in France.
Decimate does not mean "to wipe out". Nero did not play a fiddle. He just didn't.
This conflation of "liberal" with "left" dates back to McCarthyism and the Red Scare, when extremists of his ilk were trying to paint their opponents on the left with the "communist" label. It wasn't accurate then, it isn't accurate now, and it won't be accurate tomorrow.
The difference illustrated: The "Liberal" says "all men are created equal". The "left" comes up with affirmative action to force the concept into existence.
I couldn't care less how many posters get it wrong, "Liberal" does not mean "left". Period.
(/off topic)