First of all I didn't blame the students exclusively, they just like everyone else in this whole process share some of the blame. They have made a lot of false unthinking accusations and do not get a free pass. You can give them a free pass but I don't. They could have assisted the authorities if they were more responsible and more caring.He hadn’t been at the school in a year when the shooting happened, so there was an entire group of students (the freshmen that seemed to be predominately attacked) that didn’t know him.
Plus, someone did alert authorities in 2016, but nothing was done with that info: https://www.washingtonpost.com/graphics/2018/national/timeline-parkland-shooter-nikolas-cruz/?noredirect=on&utm_term=.01d4b74c49f1
He got into fights often, so my guess is that several of the students may have already assumed that officials were keeping an eye on him.
Don’t blame the students on this one, it looks like authority figures on every level in the school and community dropped the ball here.