This is Ruggers, Who isn't so much as a jerk, as he's just a dwarf.
As far as his interactions with the rest of the party go, he is extremely out of his element, and because he's naturally crass, he just doesn't hide his opinion of the way the people around him think and act.
He's well meaning in all cases, and really is just trying to improve the lots of everyone around him, it's just he's operating under the impression that everyone would be better off being a dwarf fighter.
This of course ends up with a lot of perceived rudeness, and condescenion of the characters that fight without armor, or can't drink gratuitous quantities of alcohol, or anytime anyone gets poisoned. He never overlooks the opportunity to say I told you so.
Once the journal actually catches up with where we're at in game, I think many of the characters' more positive traits will come out, especially around the Crystalhue scene, and a few others.
As of course everyone has pointed out, this is Thalia's POV, and she is about as far on the opposite end of Ruggers' approval scale as anyone else in the party. In both attitude and ability.
