Youre acting like nuking 99% of an island is okay, but the rest 1% is a big no. Both are equally criminal, and the worst of all is the guy who issued the buster call Sengoku lmao
Akainu's justification was that if a single scholar escaped, all the sacrifices would've been for nothing
And his worst fears became a reality, 20 years later Aokiji nuked an island with god knows how many casualties
Being a high ranking marine carries many responsibilities, it is not a child's game, they do not know that fairy condom will free the world eventually. So this isn't really about right or wrong, and Kuzan definitely has no right to question what Akainu did after the marines murdered all these scholars in cold blood, and to top it off Kuzan killed a friend on the spot lol