Thanks for admitting that you just come with a prejudice and follow through.
You call it "prejudice", while I call it "experience." Since you seldom deviate from arguing "straw men", I find it mostly not worth the trouble to bother with you.
And by the way, your comment above is another "straw man." You are falsely coloring a disinclination to argue with you because of past experience, with the word "prejudice" which has deliberate negative connotations associated with being unfair to someone.
No, you've had a hearing, you aren't being "pre-judged" you are "post-judged", and my judgement is that you seldom say anything worth rebutting.