Willie Schopp, would be shot down and killed in Messerschmitt Bf 110 G-4 (Werknummer 140320—factory number) on the night of 6/ 7 August 1944 at Mortain on the Cotentin (Cherbourg) Peninsula.
He wrote one or more treatises each against the apostates Reihing and de Dominis, and against Melchior Nicolai (1578–1659), Hottinger, Kallisen, Schopp, Molinos, Haberkorn, Voet, Hoe, the Ubiquists, and others.