You are being way too simplistic to blame Mubarak for the Copts when the people who killed the Copts and cheered about it, are about to try to get rid of Mubarak, like they killed Sadat
I've been through many crises and walked the streets over there and seen and talked to the people who are suffering now at the hands of other (angry) simpletons, and it is just not that simple. There are bad choices and worse choices and to get through the life day by day, you do have to choose one
Then keep working on being able to change to a less bad choice Read more history
Remember these events in 20 years
Just remember the people who killed Sadat were also gunning for Mubarak, but Mubarak managed to escape assassination.