TSOF I completely, 100% understand what you are going thru since I am in the exact same position as you are. This is a valid point though:
Sorry, but you are wasting your time. Eventually you will be forced to teach something you know to be wrong. You can't pick and choose all your talks.
I am finding it increasingly difficult to avoid certain subjects without being labeled as having a bad attitude or suspicously by the PO in particular since he does assign Service Meeting parts. I have to admit that I have gone against my conscience and went up on the stage to teach lies and I hate myself for doing it. Like LT said, this is going to grind us down eventually. What then?