it was decried by the republic

That's false. Leaders and members of the Turkish Republic denounced the genocide yet

The Republic of Turkey's formal stance is that the deaths of Armenians during the "relocation" or "deportation" cannot aptly be deemed "genocide", a position that has been supported with a plethora of diverging justifications: that the killings were not deliberate or systematically orchestrated; that the killings were justified because Armenians posed a Russian-sympathizing threat[226] as a cultural group; that the Armenians merely starved to death, or any of various characterizations referring to marauding "Armenian gangs".

and its perpetrators were condemned to death(in absentia).

True but...

In 1919, after the Mudros Armistice, Sultan Mehmed VI was ordered to organise courts-martial by the Allied administration

They were ordered, it was not some voluntary act of redemption.

Scources:

https://en.wikipedia.org/wiki/Armenian_Genocide#Turkish_courts-martial