Well, some of them are. Some are assholes and some are downright dangerous. And some are capable of formulating comprehensive (though not perfect) argument for their point of view. I must say that I too don’t find watching people kicking spherical object around the field for 90 minutes even remotely entertaining.
However if we take “normal” in this context to mean “not different from any other group of people” then I would say the title is completely correct. Assholes and dangerous people are in any and all human congregations. The compounding problem here is that while a dangerous footballer will at the worst hurt one o their fellows on the playing field, a dangerous person with a gun can do much more damage.
I think I could have a reasonable discussion with Matt Easton, author of this video and I think he missed slightly a good opportunity to enhance his point by not wearing his “Fighters Against Racism” T-shirt in this one.
To me this is another issue that is not clear-cut black&white. We have a saying in Czech “Když dva dělají totéž, není to vždy totéž.” – When two (persons) do the same thing, it is not always the same thing. It applies here.
The key difference is the attitude and intent. Weapon collectors will grumble about laws that restrict their hobby, but most of them will respect the law and for example limit their collecting to weapons of the type that is legal in their country and they will buy ammo and shoot only a the shooting range for example. They will not found and congregate in corporation-like organizations lobbying for complete abandonment of said laws . They will not amas a load of super-modern weaponry and pallets of ammo to go with it. They will hunt the rare, the peculiar, the unique pieces.
It is possible to appreciate weapons for their aesthetics and technical intricacy and enjoy learning the skills to use them without ever hurting anyone, or ever wanting to hurt anyone. And it is possible to pursue such hobby even in a country with strict gun laws – only, like in any other hobbies, other people’s needs have to be taken into account and respected.