In the aftermath of another mass shooting, Texas is looking at raising the age to buy AR-style assault rifles from 18 to 21. But a much better way to at least limit massacres—assuming that’s the motivation—is to not allow any assault-type weapons at all, unless you’re law enforcement. Being over 21 in these divisive, hate-themed times doesn’t preclude crazies and de facto terrorists from maxing out on a murderous rampage. Gov. Greg Abbott surely knows that. Surely.