Dude, read some wikis and stuff. Mutants just want to kill, survive and be the superior race.
That "order" is some sort of contract, not something like their doctrine of existence.
Also There are 2 sorts of muties, not just the one created by tha master but also the one, created in vault 87 through FEV-infestation. They had a free will from th start and no "master" to follow. They just have the goal of bloody revenge.
@ Strong-story: thank's for the advice, I actually didn't have him as a companion yet, I just thought he would be "nice" in some way, as he helps you. My mistake and now I want to search for him