Taking the names/policies/abuses of given countries out of the equation I would hardly consider it "threatening each other" where:

Country 1: Has actually threatened multiple times of wiping Country 2 off the map, all the while developing advanced military capabilities and sometimes unveiling them with writings on them of wiping Country 1 off.

Country 2: Has been threatening (and delivering) consequences to Country 1 over nuclear research and other offensive activities they have undertaken.