Keep thinking that. Meanwhile most people here wouldn't be able to fight off someone with a knife.
It takes size and muscle, shooting the attacker takes a single trigger pull.
You may not like to hear it, but guns aren't going anywhere. Maybe if we stop making out gun owners to be some raging lunatics. Then they may be more likely to give them up.
This is all pointless anyway.
A machine gun, traditionally, is a fully automatic firearm in a rifle format.
Think light machine guns (M249, PKM) or a sub-machine gun (MP5, P90)
A machine pistol isn't technically a "machine gun" despite the name. In fact, the classification of machine pistols is a debated topic even now.
In many places, they are classified as any other pistol. In others, they considered a form of PDW or Personal Defense Weapon.
But, PDW can sometimes refer to a specific class of SMG like the P90. Basically, a compact firearm with a cartridge around 6mm or so. Which the P90 fires a 5.7mm round.
Its complicated. And we should not be painting all firearms with the same brush.