I just got back from a funeral for the mom of my friend and frequent commenter Anne Wolfe. The chapel in the Methodist church I grew up was SRO; there were so many folding chairs needed, that I told Eileen they needed to bribe the fire marshal to look the other way.
Anne's a smart, good-hearted liberal librarian, and her apple seems to have fallen very close to her mom's tree. She was eulogized as a loving, good-hearted mom, worker and church lady who had a heart for the least of these and saw the good side of folks. Add a healthy dose of feminism (the empowering women type rather than the man-hating "feminazi" stereotype) and a nature-loving streak and I can see where Anne's liberalism came from.
Those are liberal virtues, but they are also virtues, period. We're supposed to care for the needy. We're supposed to treat gals in the workforce as equals rather than second-class creatures. We're supposed to look after God's creation rather than trash it.
How you apply those virtues is a point of contention. Government programs that look after the needy can be wasteful and stifle initiative, anti-discrimination laws can go awry in having every position mirroring the population to a T, and environmental laws if poorly done can stifle development and freedom that are not seemingly worth the modest gains for Mother Nature.
That conservative caveat said, those laws are generally done from virtuous desires. There can be a bit of jealousy and envy in some of the "afflict the comfortable" vibes, but by and large, liberal's hearts are often in the right place.
Mrs. Wolfe would have probably voted for Clinton had she gotten her absentee ballot in before she passed on. Not everyone voting for Hillary is a devil-worshiping, communist SOB, as a lot of folks are voting for her for virtuous reasons. Likewise, a lot of good, God-fearing, salt-of-the-earth folks are voting for Trump for noble reasons, feeling that despite his many flaws, he'd be better for the country than Clinton.
In short, there are a lot of good people voting for the "bad guy" whoever you think the bad guy is.
Also, it's worth remembering that people by and large have good sides. Whatever the negative stereotype of a group is, the average member of that group will be good parents, hard workers and generally get along with their neighbors. Only a handful of Muslims are terrorists and only a small percentage of black guys are trouble-makers. However, quite a few folks are afraid of Muslims and black youth due to those stereotypes.
Yes, we do have a sin nature. However, we're also made in the image of God. It wouldn't hurt to see the latter a bit more often.