There are a couple of nutters in every country unfortunately. Can anyone say that couldn't happen to an Egyptian tourist in the US?
When I went in November all the guides said not worry. The people are mad at the politicians, mad at employers for not giving them jobs, mad at each other(factions), but love tourists for the money they bring in.
They loved us so much by the end of the day some people where hiding on the bus because they wouldn't back off. Everyone wanted to take your picture, be your guide, buy your wife(literally someone got an offer), or sell you a trinket. I give them credit as we didn't see anyone begging but man do you need some thick skin to go there.