Neelix is a Racially Insensitive @$(-hole
... which is what I think the reason that Tuvok was always annoyed with him. I mean, he kept calling him "Mr. Vulcan"! I know Vulcans have control over their emotions, but everyone has their breaking point.
Here are normal lines on Voyager during the "downtimes", when Neelix doesn't have to force himself to be politically correct for the viewers...
"Sorry Mr. Vulcan, but pointy eared fellows don't eat at this lunch line."
"Ah Tuvok, did you hear about the Mexican guy, the Chinese guy, and the Vulcan guy?"
"Mr. Vulcan, I have specifically asked you many times to stop using that replicator booth. The Vulcanoid-only one is on the other side of the mess hall."
:D
[Edit]:o[/Edit]