When was anyone ever interested in Egyptian politics before the revolution? It was so predictable, so fraudulent, and so incredibly untrue. The very few who joined protests were blacklisted and frequently jailed. The general population was simply looking out for its livelihood.
Then something happened. They realized that they could change things, that the power was in their hands. And by February 11th 2011, far more Egyptians were participating to demolish the stigma. People were cleaning the streets, parties were starting to form, demonstrations were well organized and non-violent.
Mass demonstrations, while mostly asking for political demands, are largely apolitical in the way they express their dissatisfaction. They are not diplomatic in rhetoric or action. That is why they attract a large number of people. However, often that indifference to diplomacy or politically correct language turns to a far less beneficial form of expression: violence. That is exactly what happened in front of the Israeli embassy in Giza on September 9th .
The Egyptian public has always had a very hostile attitude towards Israel, and it is understandable.