
Originally Posted by
Golden Yak
Titans craft their creations to serve a purpose. While the Titans seem to have certain rules regarding what their creations are allowed to do (the troggs being cannibals was a big no-no), they still seem to leave their creations with a lot of lee-way. They didn't wipe out the troggs, they just imprisoned them.
So as long as the Mogu fulfill their primary function without going too far, the Titans might not care about them being overly cruel.
I prefer to think of them as simply turning out that way on their own. Like the dwarves, they developed on their own and gave rise to a new culture largely independent of Titan influence - it just happens to be a pretty rotten one.