What does it stand for?
The four finger gesture stands for Rabia after Rabia Square in Cairo, Egypt. This is where a 40 day anti-coup sit-in occurred to protest the ouster of the Muslim Brotherhood backed President Mohamed Morsi. Those who raise the Rabia gesture are in solidarity with the Muslim Brotherhood and those who suffered in the protest. What caused the ouster of Morsi was the effort by Morsi, along with the Muslim Brotherhood, to institute Islamic law into the Egyptian constitution.
I wouldn’t be surprised to see Zer0, with his Muslim Brotherhood comrades, attempt to institute Sharia Law in the United States. This would violate the The Establishment Clause of the Constitution if he did.
“A New Muslim Brotherhood Symbol: R4BIA”
“...It used to take years, sometimes decades, for a symbol to achieve global recognition, however, in the age of technology, with Instagram, Facebook, YouTube, Twitter and the Internet, this new Islamist sign went viral in days. Although the R4BIA symbol may have originally signified solidarity with massacred protesters, the meaning and the imagery has rapidly been radicalized to embody the primary concepts of Islamist propaganda: honor, heroism and martyrdom in the goal of establishing an Islamic caliphate...”
http://www.frontpagemag.com/2013/dawn-perlmutter/a-new-muslim-brotherhood-symbol-r4bia/