My view on this is probably similar (but probably not identical) to Cirt's. Speaking for myself, I have two problems with the use of "Calvinist" on this basis: (i) there are multiple ways that calling a website 'The Calvinist Corner'  the most obvious is that Slick is writing from a Calvinist perspective. Another might be that he is writing about Calvinism. To take the former as true, and draw the the conclusion that Slick is a Calvinist is an inference and thus WP:Synthesis. It's most probably true, but not the sort of thing we're meant to be doing on Wikipedia. (ii) There's a fairly strong Calvinist thread through much (most?) of conservative evangelical Christianity. There are probably dozens of articles where we could find a similar level of evidence for applying the word 'Calvinist'. We don't, and to my mind shouldn't, unless a WP:SECONDARY source feels it sufficiently relevant/important a description to make use of it. This means that such articles aren't 'loaded up' with true-but-of-doubtful-relevance WP:IINFO descriptions. I suspect that part of the problem is that much of the secondary-source writing concentrates on CARM rather than Slick personally. However this simply means that, per WP:DUE, we should follow suit. ''TalkStalk''(P)