>>2936532 (lb)
With respect, arguing on principles is a step too far in dealing with opponents. A lifetime in political activism demonstrates that policies, winningly and coherently outlined, disarms incoherent opponents. A commitment to principles comes much later.
Most people can see the inherent benefits in pragmatic approaches to policy, because they’re not irretrievably committed to principles in their own political worldview. This is the chink in their armor.