On Grit in the Oyster, the author talks about Calvinist intolerance for theology:
The second reason I don’t indentify as Reformed is because of the tradition’s resulting unwillingness to do theology. This unwillingness is deeply ingrained. And it is deadly. Since Reformation theology is equated with ‘the-gospel-faith-once-delivered’, it becomes the holy deposit to be cherished and guarded: NOT questioned or added to. In fact questioning the tradition is the very opposite of faithfulness: it smacks of unbelief. Since the doctrine is from God, our task is to maintain it, and make sure we don’t turn away from the truth.
Theology as a discipline, then, poses a threat. For orthodoxy has been established: any further theologising simply risks distorting and debasing it. The only theology tolerated is what we might call micro-theology: theology in the gaps where the movement has not yet turned its attention, further clarification of doctrines long-accepted, work on small details. And this sort of micro-theology has long been a specialty of the Reformed movement: arguments over small matters. Rival theories about the precise relationship between law and gospel, for example. We have long been champions at dividing over such minutiae. If the hair won’t split, we will happily split for it! But on all issues of any gospel-importance, the Church’s doctrine has been well-established for centuries: those discussions are closed and no further work is wanted. Any new suggestions or divergent formulations are a priori heterodox.
For context, click here.