As I have written before; the opposition in Egypt is only a part of the population. The Islamist opposition is a part of a part. The activist Islamist opposition is a part of a part of a part.
There are two things about this that are important to consider, in my opinion.
First, as a relatively small number, it is essential that activists pursue a strategy which can maximize their impact while using fewer resources, less effort, and taking fewer risks. A strategy which mobilizes most or all of your resources, expends a great deal of effort, and risks your people, while having little or no impact, is, frankly, a pro-coup strategy, not an anti-coup strategy.
Second, as a part of a part of a part of the population, if you are successfully engaging in actions with broad impact, an impact that will affect large swathes of the population beyond your own segment, you are obliged to serve goals that will benefit the population as a whole, not just your faction.
The majority of Egyptians are anti-secular, anti-neoliberal, and do not belong to any party or group. Fight for them. Fight for what benefits them. Fight for policies that will improve their lives. Fight for their rights and freedom. And do not fight in a way that harms them, and do not fight in a way that excludes their interests, their aspirations, their welfare.
Do not fight for a party or for position or for power. Fight for liberation from imperial control, fight for sovereignty, fight for independence.
Trying to build an Islamic government in the context of the current global economic system is declaring an Islamic state in the middle of the prison courtyard. Dismantle to prison walls first. Attain your freedom first.
And follow ideas not individuals. Ideas have no egos. When you follow an idea, it is because you believe it, and when you believe it, it is yours; and this transforms you from a follower to a leader. Dissolving false hierarchies is an essential step towards liberation.