Apparently I was condescending to my antivax parents.
What happened to make them think that?
It was when they were trying to convince me vaccines are no good.
I agree that you shouldn't be condescending with others. But you're certainly allowed to share your beliefs, and you can respect theirs.
It's because they say they don't want to get the flu or some shit.
Even though you disagree if you are living in their home you should not be too pushy about their medical health. People have reasons they don't want treatments, medicine is not a one size fits all.