Anecdotally, this is true in my circle.
Left leaning people around me think they are more open minded, but really they just have a different set of things they accept. They have the same number of icks, just not at the same place.
The big gap is in how they behave when in contact with things they don't like.
And right leaning people have been so far more capable of cooperating with those who don't match their values.
Also, on paper, left leaning have expressed more humane values, espacially when very general or abstract. But in the day to day, when it comes to the mondain or practical, I've seen the sexist or racist guys help more my muslim or girl friends that the ones saying every body is equal.
It weirds me out.