Quote: "I flew with them IST-AMM. The flight went overhead Cairo (presumably for political reasons). Good thing I wasn't in a hurry..."
Bit of a long way round isn't it? Can't see why a Turkish carrier would have an issue overflying Israel.
Having said that, did AMM-LHR on BD and that went north ex-AMM towards DAM then headed west, crossing the coast at BEY, rather than a direct north westerly heading and crossing the coast at or near Haifa (Israel).
Maybe no carrier can overfly Israel if the origin/destination is another Mideast country?