Having an ideology is only a bad thing when it's wrong.
When it's right, it's the same as accepting reality. You really don't want to be taking the other position.
To call someone who accepts reality, in the face of majority pressure to reject it, an "ideologue" should be embarrassing. If, that is, the one attempting to hurl an insult (and failing) is smart enough to realize what they're doing. Most aren't.
I am an ideologue when it comes to liberty. And when it comes to rejecting liberty's opposite- slavery. It's not possible to make me ashamed of this because it's the right position to hold.