I have met people from "reformed" churches they were lovely until their system was questioned.. then a different person emerged.
Some people say, "Well I must be right because everyone is against my doctrine, look it is right here in black and white in scripture."
other say "Hmm, why all the backlash and they investigate further, learn and by the prompting of Gods Spirit leave."
The latter is rare, most double and triple down, but in the end they are just angry people, that is my experience, you cannot hold that
view of God without personal consequence.