I suspect the difference here is on a social vs. economic liberalism. You will find a wide diversity of opinions on most campuses when it comes to the value of capitalism vs. socialism vs. other isms, free trades, how to manage externalities, state-owned enterprises, etc…and a lot of thoughtful discussion about same. If you are talking about social issues like race, gender, immigration, sexual identify, abortion, drug laws, etc…most campuses, including all of those that you mention, are liberal and it could be very uncomfortable to advocate publicly for positions that run against the grain. For example, if you are against gay marriage and cite scripture as the basis for that (as opposed to objecting to the institution of marriage as a whole), you are likely to be quietly shunned by many people. I say this as a card-carrying social liberal, by the way.
If being a cultural minority amidst the majority culture is not an experience you want, then it’s a good idea to find schools where there are more people whose values are like your own. It’s not that I don’t value exposure to others whose views are different, by the way - but swimming upstream all day every day is exhausting and not something I would burden a freshman with on their first solo foray into the world.