Is it correct that there will be no accountability in Qiyaamah for having usurped the rights of kuffaar?

Answer

It is baseless. On the Day of Qiyaamah, the kuffaar will demand his rights and even Rasulullah (Sallallahu alayhi wasallam) will demand from the Muslim on behalf of the non-Muslim. No one will escape zulm on the Day of Qiyaamah.