I agree that Britain First don't seem like they're alt right. but for example (though I don't know anything about him myself) would it be right to say that Richard Spencer is a neo Nazi who is alt right because of his tone/pseudo intellectualism? Except hasn't there been far right and fascist (pseudo)intellectuals for as long as it has been around? And hasn't it often throughout its history drawn on and emphasised feelings of being a victim? Or are there different reasons we'd apply as to why Spencer is alt right?Not sure they have the same 'tone' - Alt right lot seem to be more full of themselves, pseudo intellectuals thinking they have some kind of entitlement because they're so smart, and that they're victims if society (or women) deny them this. BF seem kind of clumsier, more anti-intellectual than pseudo-intellectual. There will be a class thing in there somewhere.
I don't know when the term originally got invented, I think I first noticed it during the gamergate stuff. So I've associated it with a split in internet geek liberalism between the progressive liberals and the right wing liberals. But it didn't really seem to mean anything much other than that they spent a lot of time on the internet and it revolved around pop culture stuff and involved 4channers and memes and all that so had a trendy edginess in the eyes of journalists and other people commenting on it. It now seems like it gets applied more widely, I'm just not sure how useful a label it really is.