It is by reputation very online, very judgy, and very left, so its pronouncements are perceived as cliquish and insubstantial. That's probably the case; it's probably a mistake to just go click around that site and draw conclusions according to what it says. But it is also a useful link aggregator, so when it claims something, like "this person earnestly believes that the Earth isn't round and that there is not an atmosphere but instead an atmosflat", it's worth checking the links to make sure that isn't clearly the case. Oftentimes it is.