Actually the main problem is not being “savage and violent and brutal”, but having medical advances.
Hate to say it, but all the amazing advances we’ve had to sustain and improve life in the last century has led to those inferiors surviving, and seeming normal, being attractive, and reproducing. If by compassion you mean that part of it, helping the weaker, you’re correct.
We don’t need to be brutal, though, to improve the breed.
A lot of hard truth in your post!