During the Crusades? That's like saying "Where were the Wesleyans when Athanasius needed them?"
I should have been clearer. Protestants were notably absent during the attacks by the Ottoman empire on Vienna and during the naval battle of Lepanto.
Ah. I did not know that.
Actually, it's much worse than that. During the entire period that Spain was struggling to defend the Western Mediterranean against Islamic agression the (Anglican) English and (Calvinist) Dutch were actively engaged in piracy and warfare against Spain, and, therefore as de facto allies of Islam.
I believe several of Medina-Sidonia's captains in 1588 were veterans of Lepanto.
I think much of the problem we are having today is because Protestant America has a view that makes it difficult to accept the reality of this invasion. Protestants have no history of Muslim invasion and reconquests of their land from them.