In the NYT obituary of David Greenglass the NYT trots out current leftist cliches. The Rosenbergs are portrayed as idealists. In truth they were bug eyed Stalinist lunatics who orphaned their children for the sake of a death cult. The second rationale is the material provided by the Rosenberg spy ring was worthless. That would not excuse treason.
The Rosenbergs chose death for the cause of evil. They were brain impaired death cultist losers who deserved the death penalty.