I agree that it's a bit of a stretch to suggest that there's an "anti-straight-white-male ideology", but I am a bit bothered by the fact that it seems to be ok in some quarters to use "cishet white male" as a pejorative term. (To be clear, I'm not saying everyone does this! But it happens often enough to make me uncomfortable.)

If it's not ok to use people's sexual orientation, gender, or race as a slur when that person is part of a historically marginalized group, then it is also not ok to do the same when the target is someone who is not part of a marginalized group.

This isn't "fragile masculinity" or whatever; this is just "treat others as you want to be treated".