That is an absolute fact. I personally have witnessed liberals who have exuded a visceral repulsion at even images and symbols of our founders, Revolutionary War era flags, etc. I had a copy of the Declaration of Independence hanging on the wall in my office literally sneered at, numerous times (especially by my commie boss). Those may seem like trivial examples, but they are very telling nonetheless.
Another trivial example - a person I know disliked the Arizona Memorial because it “glorified war”.