Another senseless killing

So last night some psycho walked into an LA Fitness facility, in my town, went into an aerobics class and started shooting the women who were taking the class. Honestly, what is this world coming to? Now we can't even go to a gym without being afraid...what's next? Four women were killed and the shooter killed himself. I don't agree with suicide in the slightest but if he wanted to kill himself, fine, but why shoot innocent people?? They had nothing to do with this or his problems! I'm only twenty five--I plan on raising children someday...what kind of world am I going to raise them in? It makes me so sad and afraid. We just have to trust that God has a plan for everyone....