The slogan, in Arabic, reads: ‘I am a Muslim, and I reject the persecution of Christians’. I wish we could see more of these in the Muslim world. And less Islamophobia in the west.
It was presented in an Al Jazeera programme dated 25 November 2010, presenting a protest in Cairo. You may find the clip below. The slogan appears at the 0.17 mark in the video clip. Here is the recording:
(Thanks to Joseph Cummings for the information.)
Persona 
Ginditi-va la ce pericol s-a expus din partea Fratiei musulmane.
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Am tot respectul pentru cel ce a mers cu afisul respectiv.
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