The Muslim Brotherhood's "We will not allow the revolution to be stolen again," El-Shater said during a press conference held for the Coalition of Islamic Forces.
El-Shater added that the battle for Islamists is not their headquarters (referring to recent attacks on many Brotherhood offices across the country, including in Cairo), "but rather a battle for protecting legitimacy."
"It's enough that one of the figures that is talking about saving Egypt said in an interview with an American newspaper that the opposition will unite with the remnants of Mubarak's regime," said El-Shater, referring to head of the Constitution Party and leading member of the National Salvation Front Mohamed ElBaradei.
El-Shater further accused remnants of Mubarak's regime of mobilising for chaos in the country, adding that the president has chosen to avoid direct conflict with them out of concern for stability in the country.
"There are those who want to spoil the democratic experience in Egypt," added El-Shater, arguing that ongoing protests by the opposition have not exceeded 30,000 protesters while there were a million protesters in the "Legitmacy and Sharia" protest organised by Islamists, he claimed.
He further denounced the media, accusing it of not representing the truth.
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During the press conference, El-Shater argued that current political instability is hindering any hope of investment or development in Egypt.
"In the past four months I have met with thousands of investors who are genuine about wanting to invest in Egypt. However, I can not advise them to put their money in at a time of instability," said El-Shater.
The press conference also featured a number of Salafist figures who asserted that their demand for implementing Sharia is non-negotiable, accusing the opposition -- namely ElBaradei -- of agitating against Sharia in Egypt.
"The hostility against Islam is clear, but a constitution that does not represent our Sharia is unacceptable," said Saeed Abdel-Azim, a leading member of the Salafist Calling, who added that the group is willing to offer more martyrs to protect legitimacy.
The Coalition of Islamist Forces comprises 10 parties and groups affiliated with political Islam, including the Muslim Brotherhood and its political wing, the Freedom and Justice Party, Al-Gamaa Al-Islamyia and the Salafist Calling.