Sadly, internet is full of jerks. I'm agree with The Skeezyks. The best way is to ignore them and move on. Probably just block him. You've done the right thing to not replying him. Internet argument is wasting of time and energy.

Can you find another website for posting your hobby? I believe there are still lots of supportive forum out there. Before I found PC, I've moved from forum to forum due to troll comments or no response. Try to post in other place if one place does not provide answers.