Regarding Pence and religion, I don't think he has to be able to force his beliefs on us to be bad. I think just trying to push them and directing the national conversation in such a manner is a bad thing.
I also disagree with the that the left is completely hostile to religion as it is comprised of some groups that as a whole tend to be pretty religious and it also comprises more people from non-Christian beliefs.
Dunno if you saw that 538 article I posted a little while back about Millennials leaving religion and not coming back but it gets into some of the reasons why, though that's not the main point of the article, and how it's Democrats that are mostly not coming back and suggests some reasons behind that.