its just the agents weren't well trained. Ben-Gurion wasn't chastized, and its unfortunate the agents had to spend any time in jail. Nasser was fighting Islamic extremists, and wanted a secular Egypt. Those who sow the wind, will reap the whirlwind. Lavon was the only one to emerge from this with his honor intact.
Russia: U.S. plan to provide air cover for Syrian rebels undermines Damascus fight on ISIS (Reuters)
from the article: MI figures out what went wrong in Lavon affair - 55 years later