http://www.usc.edu/dept/MSA/quran/009.qmt.html

Verses 1-5.
Believe it or not, this is the difference between Wahhabis and other more peaceful versions of Islam. As far as I know from discussing these things with others (if you are ready other forums these things pop very frequently), those specific verses speak about a historical even. To simplify things, those verses talk about pagan who had attacked muslims.

Now in the "peaceful" versions of Islam people are aware of these things, and don't conclude they should kill pagans anywhere they find them. As far as I know they conlude Allah is allowing them to fight back.

However sects like Wahhabi, treat them the verses as they appear. They don't care about metaphors, historical background, and etc. and they are also naturally violent and use the verses as a scapegoat to justify their actions.