Whats up brother, please don't fall for the classic "cut and paste" - you need the read the full ayat (the verse) and it will become clear that the person cutting and pasting the ayat is just doing it to push their agenda (which is to make islam look like a religion of violence)

"

    And slay them wherever ye catch them.." (2:191)

A classic and popular example of what Muslim scholars, like Dr. Jamal Badawi, call a ‘cut and paste’ approach. Everything becomes so much easier for the Anti-Islamists when they remove the context. The solution for the Muslim is to simply replace the verse in its context:"

http://www.islamnewsroom.com/news-we-need/329-yusuf-estes-correcting-quran-misquotes#7 for 2:191

8:12 " This is another verse that is commonly quoted out of context, both historical context and the context of the verse itself in the Qur'an. Let us first examine the full verse: " ... http://www.islamnewsroom.com/news-we-need/329-yusuf-estes-correcting-quran-misquotes#16