Well of course you have to go back and check that you were actually fair and consistent. (we all mess that up every now and then in the heat of argument) Then explain once that you think you were being fair and consistent, (perhaps with explaination) and any response above that should be limited. remember they're not reacting against you, they're reacting against the position, so dont take it personally.

Any idiot can face a crisis - it's day to day living that wears you out.