There are several people around this forum who typify the scientism cult,
Fort Fun Indiana is one of them. He rarely argues scientifically but prefers to simply attack those of us who are better communicators and thinkers than he is.
Many time he's been asked direct scientific questions and refused to answer, instead he sees questions as an opportunity for ad-hominem which is really all he ever does, he's utterly boring and I've never had a stimulating exchange with him as I have with other atheists, he just doesn't have much to say.
My advice is therefore to stop replying and simply react to his posts with

or similar, just laugh at him. I did this yesterday and after a few minutes of him desperately seeking attention he just went quiet, trying to actually reason with him is pointless, just laugh at the windbag, he'll soon fade away.
Our friend
Hollie is very similar, angry, accusative, bad mannered, frankly if people's replies are not honest decent efforts to debate and they just name call, just laugh, they are an utter waste of time and unless they improve, I will be just laughing at them going forward (they will not like being ignored, not taken seriously - but it's all their own fault).