I'm not saying I agree at all but i saw this on a journalists twitter and thought it was interesting regarding the types of aggressive groups you've probably read supporting Trump online:
"The radicalisation of especially white men online is at astronomical levels"
"Trump managed to unite all this radicalised groups such as out and out racists, sexists, meninists, anti-globalists, conspiracy theorists"
"They truly believe that it is feminists, globalists, anti-racism activists and liberals who are the "true fascists" in the world."
"That's why I never got one strategy of Clinton's campaign: e.g. highlighting Trump's sexism. Trump supporters love him BECAUSE of his sexism"
I think its a bit stupid to say the result was because of these people but these groups sure did root for Trump.