Do you know what "science" is? If you're trying to claim the invention of weapons capable of mass murder are the fault of scientists, you might want to check the difference between science and engineering. If you want to extrapolate the discovery of strong alloys and exothermic powders to the slaughter of children, then why not extrapolate the proliferation of fashion or art?

Science has not contributed anything to school shootings.

What contributes to school shootings are political, bureaucratic and narrow-minded individuals who perpetually refuse to give up their rights to bear arms and mental health problems driven by fear of mainstream medicine.

Your grasp of this concept is tentative at best. Maybe stick to writing about trivial things like fashion if you're not capable of comprehending more complex topics.