Religious beliefs seem to fall squarely in the latter category (at least to the extent that political views do). Are you really comfortable with people discriminating on that basis?
Basically: If your view demands anything of me or any other person I might know other than pure tolerance of your view, I can choose to discriminate against you. If your view only demands tolerance and only makes prescriptions for you, I can't. Obviously, the real world is a bit more messy since even a political moderate view that demands higher taxes to feed the poor infringes on my freedom to earn money - so the question where to draw that line is a matter of open debate.
Political views are sometimes similar in character to religious views, such that expressing contrary opinions results in shunning and being ostracized by one's family and community.
It's one of the major reasons why free and fair elections have to use secret ballots, aside from vote-buying. Around here, it's risky to even participate in partisan primary elections, because employers can look up your name in the voting records and determine which party's ballot you used, then engage in party-based discrimination at work that ranges from subtle to blatantly overt.
While this area seems to have more than its fair share of petty and bigoted persons, it can basically happen anywhere that requires a declaration of party affiliation during the primary.
My own spouse has turned a bit more left over the years, even as my siblings-in-law have gone more to the right. It has resulted in some rancor, as those four gratuitously post replies on Facebook for each other's posts and summarily delete replies by my spouse. They're really being a bunch of a-holes.
If you don't conform to the views of your local community, you're going to have a hard time. And the more homogenous it is, the more you can be punished for your non-conformity.