Unfortunately, radicalization of Western society is just starting. I expect a lot more events of this type to occur in the future. I see radicalization happening around us on a daily basis. Whether it's friends, family, or even stories in the media. People are unplugging from traditional media on masse and surround themselves with extremist ideologies. Stories like the above are the end result. Trump is not a cause of this. He's a symptom of the radicalization that has already occured prior to him running for president. However, the danger in that is that he now provides an echo or validation of extremist thought from a position of power.