is he really though? the older generation have conditioned themselves to be subservient. if he is firm enough wont they just do what he says?
I see your point... but you would be surprised how people can be contradictory when their beliefs are pushed.
Their whole culture was constructed by trial and error to put themselves in very specific positions, not only by themselves but by other groups from the netherworld too, and they accepted this "reality" for the survival of the race.
And in those areas, as limited as they are, they shine and here and there one of them rises above a little and carves something new for themselves... but never uproots the tree, just a little shake.
But Iruma and Co are doing something at a fundamental level.
On a... very morbid note... there is a reason why dictatorships and similar start spreading their influence with the younger generations, it is because they are malleable, and with the right "push"... they not only bring out their potential, but they can be directed.
Sure, Iruma isn't that, but it is the same mechanic... he is bringing out the kids' potential and directing them in a new way, but this way goes directly opposite to what their culture has dictated.
The Many-ears have been kicked and beaten by this world, in a way, you could even say they are lucky to still exist when their limitations are so great compared to other races, so seeing their kids having "hope"... gives them fear, that they will just hurt themselves.