That they're theists doesn't make me think any less of them, per se. It makes me think they're different from me at times, but not less, by any stretch. I grew up surrounded religious people; my sister (one of my best friends) wanted to be a pastor for a long time. Another of my best friends regularly wears a cross, although she doesn't hold to much of her Catholic upbringing; she would describe herself as a "spiritual" person. Even my SO refers to "God" and "spiritual" things. My mom is also a god-botherer, and the two of us get into it at times, but I love her and the rest of them just the same.
Nolite te bastardes carborundorum.