I prefer to assume any argument is made in good faith until proven otherwise, so please understand that the following criticisms are contextual and not, of course, personal.

The cops are armed because everyone else is armed

Bullshit. That implies that vast majority of interactions cops have with “everyone” else (ignoring the obvious hyperbole) while on the clock are with other armed people, which is not only patently false but dangerously presumptive in a grossly negligent way. In fact, the statement is so irrational that any statistic even comparing fatality rates between armed & unarmed individuals by cops would entirely debunk it; cops are not armed “because” others are, they’re armed first and foremost — and have been, since the very concept of a “police force” was first invented, FFS.

Demilitarisation of the police force can only come in…

Considering your failure to grasp the predicating concept, I’m hesitant to trust that you got the key in hand here.

…a sensible conversation about your gun ownership.

Again, this doesn’t seem to be in your wheelhouse at the moment.

It’s not like owning guns actually protects you from bad cops.

Logical fallacy and bait, not to mention an oversimplification of the actual issues at play.

So, do you want to have an adult conversation or just bark across the pond (where we’ll be touching on various police issues y’all have on your island yonder, to be sure), hmm?