What I'm saying is that I don't expect the Bishops to known PRECISELY ALL of the individual complicated laws, restrictions, and regulations (that you yourself have said change from state to state, from province to province, from country to country) on a totally secular subject. I WOULD expect that they might want and seek out some counseling or advice from experts themselves. I WOULD only expect them to have intimate and COMPLETE knowledge of "general requirements of Christian living."
BTW, I think it is YOU who have the dividing line. You see, I think that life IS religion and morality even as we are IN this secular world. I have merely noted that the Bishops don't seem to realize that the restrictive secular gun laws that they want ALREADY exist to the books. I further note that it doesn't stop this madness. Since that is so, perhaps there's something else that's causing it.
Now how about getting back to the subject of the topic--the Santa Barbara murders--which are three by hammer and knife and three by legal and registered guns and a bunch of folks injured by a legal and registered car?
And don't forget that the police had an opportunity to stop the killings, but didn't and the many youtubes the mentally ill youth posted and the manifesto he wrote about killing for "retribution". Oh and remember that this was in California which has extremely strict anti-gun laws already.