When it comes to pretty much every social issue, the conservative stance is entirely rooted in selfishness and a lack of empathy. The idea is "that doesn't work for me, so it can't work for anyone". That's homophobia, misogyny, racism, and religious bigotry in a nutshell. And when it comes to a lot of economic issues, sometimes it comes from genuine skepticism about whether or not we can afford things, but it is mainly a matter of "I don't want my tax money going to things that will primarily help people who aren't me".
The modern conservative movement is almost entirely based on a lack of empathy. It is about the white, male, Christian, heterosexual, rural and suburban, non-lower class getting theirs and maybe sharing if it benefits them, such as with women they view as "their women", or sometimes their own kids who come out of the closet. Exclusivity and "other"-ness are basically all that conservatism has to talk about. How bad the other people are and how they don't deserve to share this amazing country with conservatives. They're extremely lucky that liberal minded people are inclusive, even to our selfish neighbors. But they are wrong, and we're tired of listening to them whine about how much better they are then the rest of us, and we're tired of catering to their tantrums.
Liberté. Égalité. Fraternité.