Is it your normal tactic to claim that people who disagree with you don't understand what you are talking about?
It is my normal tactic to point out that people who don't seem to know what they are talking about: don't seem to know what they are talking about.
Am I supposed to think that someone who claims everyone is an evidentialist and thinks that "epistemology isn't about evidence", knows what they are talking about?
If I honestly think that a person lacks understanding about something, should I hide my opinion?
Well I am open to being persuaded by evidence
Good for you. I hope you find someone who cares to try and persuade you. That person is not me.
I feel no obligation to a person who pops up (with what seems like a very poor grasp of what epistemology actually is) to say "epistemology has no value" and then demands that I persuade them of its value.
I have drying paint that needs watching first.