In the short time I've been here, i've noticed that right-wing members invariably resort to mendacious ad hom attacks against others.
Judging by the quality of their arguments, I'm convinced it's because they lack the intellectual ability to posit their arguments. Whether it's because they really do lack the intellectual capacity to form their ideologies and beliefs into words, or whether it's because their ideologies and beliefs are so fragile, any supporting argument for those ideologies fall at the first hurdle.
I guess it can be both depending on the individual. For instance, take motorbiking, obviously an intelligent person, but twists and misinterprets news, studies and legislation to support his right-wing ideology.
On the other hand take Highway Man, Nwgs2, Fillystine, Mottie, Johnny2007, and others, they obviously lack the ability to form sound arguments, avoiding logical fallacies, to present their supporting arguments for their ideology. So they resort to ad hom attacks.
Sometimes those ad hom attacks escalate into vicious, mendacious and perfidious attacks on other members, often referring to them even when they are not participating in any discussion in that particular thread.
They've proven themselves to be incapable of hearing or considering another's opinion, and seek to destroy the reputation of their opponent.
Sometimes forming themselves into little gangs to create these attacks. Sometimes virtual complete strangers join in these attacks demonstrating their perfidious and cowardly nature. devoid of any honour.
Sometimes when challenged they deny all knowledge of the original issue, and blame others for their misinformation.
Without a doubt the far-right, and some right leaning people are a danger to social cohesion. And some social media sites allow and support such behaviour.
But there are some left wing posters who adopt such tactics also.