People all over Syria are chanting "Allahu Akbar" from their homes right now, you can hear it on the streets, and in many places they're protesting too, giving security forces a really hard time on the very night they need be resting before suppressing the big protests.
Since the beginning of the revolution the protesters have been completely nonviolent, and the revolution has nothing to do with religion as the protesters are literally from every single little background... but the killing/arrests/torture has reached an unthinkable point of monstrous inhumanity and tomorrow is Friday...
Now, all the huge massive protests happen on Fridays because it's the weekend day where people can safely gather in mosques for the noon prayers (in this case people from all religions/non-religions) because it's the only place where they're relatively safe from the regime thugs, and then the protests emerge right out of the mosque doors at the end of prayers, and that is when the massacre begins against them.
So tonight apparently the silent majority has decided to break its silence and do something to encourage the protesters and wear out the security forces & thugs before the big day. Allahu Akbar is muslim-speak, so they can't be arrested for chanting it, but in arabic in general it's an expression used to renounce injustice, and has in this context nothing to do with religion. Worth mentioning is also that the very same phenomena happened in the Arab world during revolutions against colonial occupation, namely in Algeria, one could hear "Allahu Akbar" coming from every home in the capital at dawn, when the executions are carried out, so that the prisoners on their way to the gallows could literally hear the whole city chanting for them.
Allahu Akbar over injustice!