If only it was containable to Urban. In fact it's broadly representative of liberal/left thought as Varoufakis' (someone I previously had some time for) 'hang in their sisters' tweet so nauseatingly demonstrated. Our side is fucked by these types again and again.
I don't think people are objecting to calling the Taliban medieval for that reason though.
I object to calling them "medieval" and, yes, "othering" them for probably the opposite reasons to what you're imagining.
Aside from the points raised by others about Taliban ideology being a relatively modern phenomenon, the failure of liberal democratic institutions is not caused by "medievalism" and it is not something alien or unrelated to the contemporary political situation of western countries either.
I don't think the failure of state building in Afghanistan should be looked at independently from the failure of the Arab Spring.
Nor should it be looked at as unrelated to the global decay of liberal democratic institutions. This includes the emergence of China as a mature fascist superpower and their attempts to export their tools of repression to developing countries, and the transformation of Hong Kong into a repressive totalitarian police state; the return of military dictatorship in Myanmar; revanchist Russian gangster capitalism and Eurasianism; erosion of democratic norms by religious and nationalist Conservatives in Hungary and Poland; and in the Anglosphere, we also have a general loss of privacy and the rise of surveillance capitalism and unaccountable power of tech companies to shape and regulate public discourse; a brazen yet failed attempt by a President of the United States to overturn the results of a democratic election, backed by populist nationalist supporters willing to use violence, and an openly corrupt British government continually undermining rule of law and separation of powers, stacking public institutions, broadcasters and regulators with their supporters, and legislating against the right to protest.
The problem with "othering" the Taliban as mediaeval is twofold. First, a tendency to see non-western regimes as fundamentally alien is also what western tankie types who support anything if its perceived to be against the west do. Syria, China, Russia or wherever are not real places to these people, but kind of imaginary foils to the west, which allows them to support reactionary regimes in other countries which they would never dream of supporting in a western country. I'm sure we are on the same page here in disliking these people.
The second problem which comes from othering these regimes is a failure to see them as local expressions of a modern systematic failure of liberal democracy to deliver.
I think this ultimately stems from the loss of sovereignty and declining power of labour caused by globalisation, as well as a kind of global transformation from 20th Century capitalism into a kind of rentier, neo-feudal economy, with inflation of real estate being a key part of the global financial system. Both of these things have already made liberal democratic institutions wholly inadequate for delivering a society in which democracy is more than a formality.
I think the only way out of this is to double down on internationalism, but not in a western-centric way which kneejerk supports any perceived enemy of the west. Instead, it means recognising that the interests of people protesting against corruption in Russia are not dissimilar to the interests of people protesting against anti-protest legislation in the UK, and that the British establishment is in fact heavily intertwined with Russian gangster capitalists investing in UK property and football clubs; recognising the complicity of western corporations, universities and financial institutions in Chinese fascism and making common cause with Uyghur, Hong Kong or Tibetan groups on this basis; and recognising the similarities between the Taliban and right wing terrorism in the US - from incels to white supremacists - and making common cause on this basis.
The problem is breaking out of a kind of binary thinking left over as a Cold War remnant, recognising that we already essentially live in one world, and trying to create a political vocabulary and language which allows for a genuinely global democratic movement and authentic solidarity with progressive parts of Afghan society. Dismissing the Taliban as medieval is a problem not because we need to be touchy feely and nice to the Taliban or something, but because it underestimates how ominous their takeover of Afghanistan is for democratic ideals everywhere, not just for the region.