I really like what Elaine said about trying to give people the benefit of the doubt: "Never attribute to malice," in other words, "that which can be better explained by thoughtlessness."  Robert Hanlon 

I also agree that coworkers should (along with friends, parents, and people as a whole) treat us kindly and respectfully, as we would prefer them to do, but does it follow, on account of this, that they *must*?

And lastly, at the end of the day, why does it *really* matter so much what *they* think? After all, they're humans just like you. Why is it not more important what you think.