Well considering that major newspapers and other news outlets worldwide covered this as evidenced by the reference section in the article apparently quite a lot As for important people being killed Id suggest that every person is important to those over whom they have some influence And who knows what one of these people may have accomplished in his or her life if it hadnt been literally cut short by this disturbed person Perhaps one of them would have discovered a cure for cancer or perhaps an advanced method of transportation which didnt need fossil fuels Notability has nothing to do with a person being important though there is some overlap between the two Notability has to do with how much information can be found out about them in reliable third part sources If there is enough to create a well sourced article such as this then the topic is absolutely important and notable And remember please try to remain civil calling people rude names does nothing to inspire people to want to answer your questions