Aren't these the same sort that will moan ceaselessly about the ludicrousness of "safe spaces" and "snowflakes"? I don't particularly care. You're free to speak your mind. You're not free to force people around you agree. Either get over it, or move on. I hear welding is an in-demand industry and I bet they'll find more receptivity to their viewpoints there.
Nice job making sweeping generalizations about an entire industry. If this type of bigotry were based on skin color, we'd call it racism.