away with it.
Imagine a bunch of people speeding, breaking the traffic laws. The cops only catch a handful of the offenders; the others get away scott free.
Such is life.
And again, I never said Egypt couldn't ban the Israelis (they're certainly within their rights to do so if they want). I simply said that they should then be prepared for other groups/countries to react to that decision -- and if they lose millions in tourism dollars and never host another international medical conference, then that's the price they pay for refusing the Israelis visas.

If they're willing to pay that price, then more power to them.

"Marriage is a wonderful institution...but who wants to live in an institution?" -- Groucho Marx