It's a total load of bollocks thinking that this can be separated from politics though. The perception of just about everyone on this case is informed by their politics, or by a set of values that informs both their opinions on this and their politics, which amounts to the same thing.
This is not artificially divisive because some extremists and political leaders interfered, it's intrinsically divisive because it strikes at competing visions for how society should function. On the one hand, unhappiness with perceived unfairness of militias taking the law into their own hands and police killing people with impunity, and on the other gun rights, self defence and the rights of civilians to impose social order themselves.
"It's just the law" is garbage. The exercise of the justice system should be neutral, but the statutes of a jurisdiction are definitely not. These statutes are made by politicians for political reasons to best represent the interests of their voters (and anyone who disagrees is expected to suck it up). The decision to let untrained 17-year-olds take lethal weapons into places they shouldn't be and end up shooting people is a political decision. It's not "facts", it's not "objectivity", it's the way some voters at some point wanted it and so was codified. It is perfectly reasonable for other voters to think that letting them do this is a crock of shit.