Setting the Stage for Another Parkland:  The father of a student killed by Parkland shooter Nikolas Cruz believes that California's newly-enacted ban on suspensions of willfully defiant students creates an enabling environment for another mass shooting.  Andrew Pollack's article in National Review notes that the Broward County school district had adopted the Obama Administration's lenient discipline policy based on  the "school to prison pipeline" narrative that allowed the deeply disturbed Cruz  to remain on campus.  "The state of California has just lurched far harder on leniency than Broward, by banning suspensions and expulsions for nonviolent offenses," writes Pollack.  For evidence, he cites the Los Angeles school district's ban on suspensions, resulting in a 145% increase in referrals to law enforcement and a 70% increase in threats of violence last year.  "I sent my daughter to public school thinking she was safe. I had no idea there was a kid there so dangerous that they frisked him every day. I had no idea that the school was systematically covering up threats and violence. I didn't know."