Twice now in recent history we have had people murdered who were attending a concert and attending church.   The First Amendment, among other rights, granted them "the right of the people to assemble". 

However, am I to understand that the "right" to possess firearm technology capable of quickly killing many people who have peaceable assembled "Trumps" (no pun intended) that right to assemble simply if for no other motive than intimidation? 

Speaking of intimidation, doesn't a masked person dressed in military garb (including body armor) armed with a semi-automatic weapon with bump-stock attached and carrying multiple high-capacity magazines, have every right to stand outside any gathering of citizens?