Even if it is nuked that will not solve the problem.
Terror does not require a bomb to be on these planes. Just the threat, the call, the report is enough. It robs our freedom.
If Mecca were nuked, preferably with something having a long-lasting isotope, performing the Haj would become a dilemma, and many Muslims would be given reason to ask whether or not Islam is the real deal or not. Even many who did not leave might become less fervent.