Darn. That's quite hard to deal with. I am sorry you are going through that. ![]()
I wish I had some first-hand experience to share with you, but as you know myself I have been pretty shy to make my own videos and stuff.
Trolls look for reactions and any sort of acknowledgement so don't give them that. Don't mention the situation in your videos, don't engage with them just try your best to ignore them.
Another thing that comes to mind is to check out Rebecca Black's vlogs. I am sure you probably can remember the fiasco on the song "Friday" that the internet labelled as the worst ever. She had to deal with a lot of crap and harassment that no doubt still follows her so whatever tips she has to offer on the matter are very well worth consideration.
I think right now, it might be best not to read the comments in your videos if you know the majority are going to bring you down. At least until this calms down.
The best tip I've received about it is that it is out f our control what people think about us. accepting some people will think bad things about us that is not intrinsically good or bad, just what happens we all have people we like and dislike and we have at some point claimed to dislike someone we don't know based on the what the media says. We choose to dislike the projection, the shell we have of that person and just like that the trolls you have are hating the projection they constructed based on whatever video the atheist used to mock you.
I hope it all gets calmer for you in your channel soon. I am sorry you have to endure this. >_<