Khrushchev got Kennedy to agree not to invade Cuba and to withdraw our Jupiter nuclear missiles from Turkey. That was an entirely acceptable outcome for the USSR, far better than what was publicly known at the time by the American public.
If Khrushchev or any of the Politburo were enraged and calling for JFK’s death Morris Childs would have known about it. He continued to be a highly trusted friend of the Politburo right up through his last Moscow visit in the late 1970s. The only one raving about killing Kennedy was Castro.
Actually, according to Pacepa, Khrushchev was outright livid about the whole ordeal, actually screaming at various intelligence agencies about how he wanted “the viper” dead, and one of those people was Pacepa’s own boss for the DIE.
So far as Morris Childs, you know that they most likely would have been aware that he was American and thus were likely lying to him in terms of Soviet disinformation, right? Pacepa’s book Disinformation even gives quite the account on that that actually indicates that Childs was himself being tricked.