Nah dude, when I'm in that position I take it as my duty to be an advocate for metal.
There's so many genres of metal that I can almost always find something they like. Maybe they won't like Fear Factory, but maybe they'll like Nightwish or Amaranth or Alestorm. We can find out together!
Maybe you'll like powermetal? I like uplifting music about fuckin dragons.
Or maybe symphonic? There's some amazing harpsichord riffs out there.
Or maybe something you can dance to? It's not all head bangers!