Perhaps you have spent more time in Saudi Arabia, Egypt, Bahrain, the UAE and Dubai than I have. And while there are some of their customs that I follow while I am there, we do not hold hands.
Moreover, the picture in question was taken in Texas, not Saudi Arabia.
Holding hands is not a sign of subservience (though Americans think it's creepy). Never been to the Middle East, but I read extensively and I am sure that I have read in multiple places that holding hands in Middle Eastern countries is a sign of friendship (not homosexuality).
The POINT is that a bow or salaam from an American president demonstrates a SERIOUS problem.
We've come a long way from the days of John E. Ward.