Hard to strike a balance, I suppose. We should perhaps remember that even in Elizabeth’s time, there were those in the Church of England who were quite friendly and sympathetic towards Campion. I think in particular of Bishop Cheyney of Gloucester, who persuaded Campion to take deacon’s orders, and who Campion when he returned as a Jesuit tried to bring back into the Roman fold. In the end neither would completely compromise with the other, but it’s a far cry from the dungeon, fire and sword with which the others threatened each other.
I’m not a relativist, and at its core neither is the Church of England, but that doesn’t mean we can’t, or shouldn’t, recognise the genuine, true faith of those with whom we are not yet in full communion. There have, of course, been times where Anglican and RC martyrs have died for the Gospel together, e.g. in Uganda.