I went to Egypt a few months ago. From the state of the parked empty boats on the Nile, the tourist trade is down by 90 - 95 percent. There are still crowds at Abu Simbel, for instance, but in few other places. We have to depend on the advice of the Foreign Office to tour operators - if the FO says avoid that place, the tour companies must do so or their insurance will not cover them. If the FO doesn't issue warnings, we must assume the tours will be as safe as they can be. The warnings are based on Consular information sent regularly from foreign countries to London by consulate staff.
I have visited Tunis and that superb museum, so I know what the place is like, and I grieve for those who have suffered and died.