try to gain his respect?? if he's a powergamer and one of his character's personality traits are that he hates dragons and spellcasters, you're kinda screwed...powergamers don't like to give up the little character quirks they call roleplaying.

what kind of character are you playing?? does he really want the respect of someone like that?? would he rather the ranger gain a respect for ALL spellcasters or just yours? would your character become aloof or even confrontational about it?? would you try to save his life to gain his respect, or show off to earn his respect through fear?

i personally would probably go the latter route with my character, becoming increasingly agitated with him and trying to display the power of magic...if i were human...and anything but ultra-good