It depends on why their views are different and what their ethics and morals are. Sometimes people can鈥檛 want the same thing but approach it differently and have faith in different people. Obviously I would not date a bigot.
It honestly depends on the extent of things. Varying opinions on a few things, especially when they aren't extreme isn't too bad. But like, if their views basically equate to being racist, sexist, homophobic, etc it's hard to respect them as a person.