It is not Islam that experiences violence, it is people who do. It is people who commit acts of violence and it is people being the victims. The question should be why people do this and if religion as such and Islam in particular is to blame. Religiously motivated violence needs people doing it. All those cults from the Near East, including Islam, Jewish Religion or Christian Religions are siblings. The bunch incorporates deadly rules and ideas from the core and knows little tolerance if at all. That is why those religions are easy to use as aggressive ideologies. And you can virtually base any subhuman shit upon those anytime. So when you live under harsh conditions blame other people and kill them in the name of gods.