Does the Quran preach Violence?

"Some misguided critics who happen to always come across some Quranic verses, and show it to people who know little about Islam. They give the impression that Islam sanctions the killing of Jews and Christians at all times. It is important to always get info from the most authentic sources i.e., by reading and collecting information from Muslims, rather than Islamophobes who spread hate, since their job is to bash Islam and Muslims. For example, would someone go to a Nazi to learn about Judaism – or would you do so to a better source such as a Jew who practices their religion on a daily basis? The answer would be obvious, is that you would learn from a Jewish person about Judaism. "