To be fair to Gaias, at least in his case he did it because he wanted the acknowledgement of his parents, once he got over that (and a bit of humble pie) he's becoming a better person for it, not telling you to like him but i actually like a story that has the characters grow out of villainy like this.
So is it okay for him to try to kill and cuck Julius because he just wanted to be acknowledged by their parents? he already had their acknowledgement btw.
I still don't understand why should I care about Gaias. He was and still is a piece of garbage just like their parents. I roll my eyes every time a chapter focuses on him.