Agonus:
Disagree and act like an ass - you're a tool of Satan.
Disagree respectfully and be a total sweetheart - you're still a tool of Satan.
Damned if you do, damned if you don't.
True, but the difference is how YOU act. As you pointed out, you can act like a an ass.....or you can act respectfully.
I prefer to disagree with them in ways that allow both me - and them - to keep our dignity.
I'm not sure this is the way to do it.