What are the reasons for revolting up until now. I don't understand why people still go to tahrir every fri?

I know what is happening: 50% of the people who went yesterday to Tahrir sq are not happy with the army and transitional govt. performance especially when it comes to Mubarak and the rest of his thieves. The other 50% and this is very important want the new constitution now, why? because according to our army the new constitution will form from a committee of 100 Egyptian scholars chosen from the new Parliament after elections in September: Now if the Muslims Brotherhood and Salafi parties win upto 60% of the Parliament seats then they will be allowed to choose upto 60 scholars to represent them in the committee of 100 that will form our new constitution: so you can imagine 60radicals will have a say on our new constitution and many of them and their sponsors want an Islamic strict Sharia law constitution: and that is why so many protesters who went to Tahrir yesterday are wearing the Muslim and Christan wa7da watanya posters and emblems. Now our only hope and best scenario for us is that the MB and Salafi parties win no more then 30% of the Parliament seats: that means they would only be allowed to field 30 scholars to represent them in the our constitution committee thus we would avoid going back to the stone age.