today i returned to windhelm i did do a quest a few days ago (after that i stopped playing skyrim for a few days) and when i returned to my house in windhelm i tried to get j'zargo to place some nice goblets i found in my travel's on a shelf with no luck but i got him to take some wine then all of a sudden calder attacked me, so i killed him.

You probably killed his chicken.

as far as i know he doesn't have one since he always ate my food!!

but still it's weird that he would attack me.

Strange to know a Nord would get angry about wine. If it was ale or mead then I'd understand why he attacked you.
I Guess he's been to Cyrodiil.

it was a wine bottle.

calder was useless anyways all he did was eat my food.

i just continued my earlier game and while me and j'zrgo where upstairs in my windhelm house i had j'zrgo pick up a few things of mine then my imperial's husband marcurio attacked me, wtf??

Calder is odd. I once had him Jenassa attack and kill another companion I had with me because they all wanted some vampire's old boots I'd dropped.

well i reloaded my saved game and this time marcurio was nice to me he didn't attack me.