Why are you even answering my message? Did you decide to tell me that I don't know English? I think you should see a doctor. It's not my native language, I'm writing with the help of a translator. And I ask you to shut up next time and not answer messages that you can't help with.
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Don't let an obvious troll bother you. He doesn't open with capital letters. He put a period (rather than a comma) after "first of all".
Also, his comment is backward. Rather than not needing a comma because the question is "not an actual sentence", it should have been a period because the question part is a new sentence. Mixing up a period and a comma is something native speakers do all the time