Nadare looks like he gon' suck that Fuyuzora dick, ngl.
Also, the whole point is that the Tenko and Yoinzakas ARE afraid of the Yatahagane, if they get strong enough to stop fearing him it's because he's no longer a threat to their might - which means they can act based on pride and arrogance instead of caution and compromise, thus both sides would immediately stomp him out for their earlier fears as if to say "How dare you be so strong our past selves were scared shitless of you!? Time to die!" and then get back to their war, instead of being too scared of him to rampage all across Asia at each others' throats.
The philosophy of Nadare remains idiotic.