My theory is the military, which runs the economy, cut off food and fuel while Morsi was in office. It seems to have suddenly returned after he was deposed. That still leaves the problem that the majority are Islamists.
Your theory sounds plausible, Pan_Yan. I have to wonder which is more dangerous to the civilized world: Islamists or hungry Islamists.
A rabid Islamist that would murder a Christian, kill an American/British/German Tourist, one that would kill its own women for not wearing proper garb, or one that would imprison his detractors is not better than an Islamist who would not do those things. The MB are murdering 4th century thugs who should be exterminated.