I really don't have the patience anymore

To deal with stupidity. I know its my job to the understanding one but some of these parents are just too far gone. I don't know what to say anymore and I find myself getting so cranky.

I just warned my supervisor(who is really cool and a lot like me in the way he handles parents) that he may get some phone calls today. He said, not to worry, he already warned our prinipal the same thing about him!