Not to be overly pedantic or anything, but there's no hard data to back something like this up, as it's mostly anecdotal. Not saying it's flawed or anything, but peer pressure can go both ways. The community in which you exist can be hostile to whatever is less popular. There's plenty of liberal voters in the south and midwest who aren't open about it for the same reasons.At a glance, yes. Democrats that identify as conservative only make up a minority. Bear in mind though that many Democrats, especially black voters, feel compelled to vote Democratic because of peer pressure. In private, they're receptive to voting Republican. Bear in mind too that politics is like identifying with your favorite football team. People identify as "liberal" because they identify with the Democratic Party, but they are operationally conservative instead of being operationally liberal.
There's also a stark difference between voting for the "opposite" party in municipal and state elections and voting for them in federal elections. I've voted multiple times for my county councilman despite him being Republican. Granted, the sort of policy municipal officials have a hand is mostly no-brainer things like repairing roads or building new schools but yeah.