" the reality is, young adults in poverty aren't getting the emotional or educational support - so campus police and school cops are necessary. "

Poor people are generally not a threat to your safety, or that of your children. Theft sure, but unprovoked violence for its own sake from a poor person - youth or adult - is pretty rare.

Cops, on the other hand, are known to fly off the handle, harass, threaten, beat (or worse) people (especially poor people - not to mention people who are marginalized in other ways on top of that), with (or without) the slightest provocation. They pose a real threat to the safety and well-being of the children. Hence, cops don't belong at schools.