2012-08-06 00:55:12 UTC
1. Muggles have numbers on their side, they outnumber wizards by an incredible amount.
2. Experience: Muggles have had far more experience in fighting wars than wizards, muggles rely on technology to live and fight better while Wizards just rely on magic for everything. Muggles can improvise where Wizards cannot.
3. Attitude: Wizards (esp. Purebloods) THink that muggles are worthless scum, so they ignore everything muggles can do, e.g they might have the ability to turn a tank into a banana, but they wouldn't know what a tank was until they got hit by a shell.
4. Limits of Magical ability: Lets say there are 10,000 wizards in Britain (High estimate judging from the books), how many of those have the ability to turn a gun into a teacup? Only the experienced teachers and old students so they makeup around maybe a 2000, the rest consist of regular adults that can't do anything against high tech muggle weapons and the kids......most can't even stun people let alone disarm a muggle with a gun.
So that leaves a few hundred wizard 'warriors' that are actually able to fight off a muggle army, they would get taken down slowly one by one while the population of the UK is around 60 million.
Muggles win hands down, even if it would take a while, any constructive criticism is welcome.