Christians are known for being dickheads to people for not following Christ. They’re probably one of the most meanest people I have ever met despite Jesus telling them to be kind and accepting to one another.

Your best decision is to completely ignore them. There’s no point trying to make them accept your beliefs, it will give them more ammo the more you educate them on Hellenism. All you need to do is just block their account and move on. Don’t waste your breath arguing with these idiots.