Martin Luther and John Calvin would have been in alliance with the Catholic Church against the modern secular Left. There is no doubt that the Left is Satanic and opposed to all flavors of Christianity. That’s why I think all branches of the Body of Christ had better pull together against the Left.
I agree, but that is going to be hard to have when allegedly Christian churches fail to hold the line against the homosexual and abortion lobbies. Whether you'd want to include those misguided souls is a matter for other debate, but they weaken the stance of Christians everywhere by sccepting such policy into their Churches.
That we are under attack by the Left is patently obvious, as is the one they serve.
I, too think Martin Luther and John Calvin would have sided with the Pope in this, where the Christian churches are under assault.