There are always problems in foreign countries somewhere around the world. As peace keeper for the world, the United States is expected to respond to each and every problem.
The reason they are making a fuss over John Kerry not being available for the Egyptian crisis is because this crisis is an embarrassment to the United States. The U.S. had supported the overthrow of former Egyptian leader Mubarak in order to put President Morsi into power. Now the overthrow of the first democratically elected president by a coup shows that Democracy in Egypt is a failure. We feel responsible for this failure. Some countries are just not ready for a democratic form of government.