As the assassination of Sadat proved, the Arab irredentists, like the Zionist ultras, have always been unerring in picking off any incipient mediators.
If you describe someone's judgment or ability as unerring, you mean that they are always correct and never mistaken. She has an unerring instinct for people's weak spots. = infallible + unerringly un·err·ing·ly It was wonderful to watch her fingers moving deftly and unerringly. always right
Committing no mistake; incapable or error or failure certain; sure; unfailing; as, the unerring wisdom of God