Paul called the Galatians "foolish" for their errors.
Using your reasoning Paul was "trolling" the Galatians.
If these conversations are too much for you head to the caucus threads.
You can join the two other Roman Catholics who post there; though I doubt one would agree with you. That poster doesn't even agree with his/her fellow RCs on matters.
Christ was not gentle with the money changers. At some point heresy and apostasy have to be called out. It is not living to let someone persist in error.