They're doing a really poor job of masking their insecurity by attacking you because they wish they didn't feel the need to wear makeup. They wish their skin is clear like yours. As others have already said, it's ridiculous of them to put your down over something that is your choice. Their jealousy is their weakness. Makeup makes you uncomfortable, you don't like it, so you don't have to wear it. We all know it's not healthy for skin anyway.