atheism

I just need to vent. He's been watching ghost tracker shows on TV and wants to download some app that tracks "ghost voices" and asked what I thought about it. I was honest, that it could be fun but it's obviously not real, and he told me I sound like a total close-minded neckbeard because "we don't know" and "there's no proof they don't exist." I'm upset because this is a grown ass 36 year old man who's absolutely smarter than that, and his insulting ME for not buying fairy tales frankly stings. I can understand religious people being offended by my not believing in their faith, but I don't deserve to be mocked for not believing in freaking ghosts.