is there a single death eater related problem in all those damn books n films that couldn’t have been solved with a glock or a hand grenade

I remember reading book 3, and they completely discounted Sirius Black having a gun.

Like the line was something along the lines of “…and is believed to be armed with something that muggles call a “gun”…”

Like I understand the need for secrecy between the two populations, but it’s like they completely isolated the wizarding population from the outside world.