I, and presumably others, associate obsession with religious minutiae with religious fervour. I have a lot first hand experience with this, as some of the most ardent Christians I knew were also the ones who were eyeballs deep in apologetics and church history (and also adult converts). It makes a certain amount of logical sense too, as you wouldn't expect a casual church-goer to care that much about all that.

With that in mind, it isn't a big leap to connect the original post to the phenomenon of the zeal of the convert.

What it comes down to, then, is that the original post has more than one layer to it. Rather than focus on the difference between charity and dogmatism, I chose instead to highlight contrast between the simplicity [of charity] and the convolution [of dogmatism]. Once again, my personal experiences informed the way I approached this post.