I would like to direct your attention to an important statement here. A group called Presbyterians and Presbyterians Together has drafted a statement, and they are inviting you to attach your signature to it. I would strongly encourage the same thing.
The importance of this can hardly be overstated. This is not an abandonment of necessary debate within the Reformed world, but rather a commitment to conduct theological and doctrinal debate (within our confessional boundaries) in a particular way. The bottom line of that “particular way” is a commitment to avoid rash and intemperate judgments concerning those who share a commitment to the historic Reformed faith. In other words, don’t drop the H-bomb on your brother.
As I have argued elsewhere, the Reformed tradition has contained diverse elements from the beginning. That continues down to the present — which is why we have the URC, the OPC, the PCA, the OCRC, the CREC, and so on. We can have our various distinctives, and even think that they are important enough to guard during presbytery exams, without consigning any of those who differ to Dante’s fifth level. So please, check this site out.