The Muslim Brotherhood's supporters held a large rally in Cairo, and
soldiers
shot at them.
Elsewhere in Cairo, Secularists and Islamists fought, and someone
started shooting. Perhaps that was the army too.
Rebooting democracy with new elections might be the best thing under
the circumstances; repressing the Muslim Brotherhood would make it
much worse. Excluding them from democracy for a substantial time
would be oppression; however, what they do when they get power is also
oppression. It is hard to choose between them.
One article suggests this might convince Islamists around the world to
give up on seeking power through democracy,
and use
violence instead.
This might occur, but what they do when they gain power includes
violence too.
The second article suggests a stratagem that might have avoided both
of the repressive outcomes. I don't know enough to judge whether it
would work.