Well John, it 'may' be that Democrats/Liberals do have a few more causes about which they'd like to see a basic position 'settled' ...as in 'no longer attacked' by those who wish to, as I said above, impose personal moral/ethical systems on the populace in general. (Stuff like being free of prayer at neutral, public events)
I dunno, though...conservatives too seem like THEY would like to get their beliefs labeled as untouchable. Each group has a list....differently flavored, but emotionally charged.

As to my sensitivity about phrases like "liberal causes": I have heard that and similar language used in contexts SO often where the speaker or author was coloring the word 'liberal' with opprobrium similar to how he would refer to "communists" or "atheists". It is when the phrase is tossed in as if 'everyone ought to know' what THEY believe!
If *I* read too much into YOUR post, I also apologize. It certainly is hard to sort out nuances in print...thus my probably excessive use of bold and other HTML stuff to try to 'sound' like I would speak.