Morality has always been objective, and the idea that it's subjective is just a philosophical exercise with no practical application.
I also don't find it coincidental that it comes from the group (liberals) where every idea is 'on paper this should work'
If I put on a clown mask and chased a random woman down the street with a knife,nobody's going to be like
'well maybe that's ok maybe it's not. It's up in the air in people's opinions'
No. Instantaneous 'this is bad'. Lol