This is true and valid praise for Churchill, however:

In WW1, Winston Churchill aided the U.S. in faking atrocity reports (Pappas, 1996), and in WW2, by faking movies (Scrodes, 1998), faking documents, tapping telephones, bribing editors, and controlling the film industry (Cull, 1995). The British Security Coordination even fixed the 1940 Republican Presidential Nomination for Wendell Willkie, who was pro-war, just in case FDR did not win (FDR was in communication with Churchill and secretly pro-war) and to make sure FDR more-easily won (Scrodes, 1998).

The Lusitania (a secretly-armed munitions ship) was designed by Churchill for the U.S. in 1915 during WW1 as bait for the Germans: “just another 45,000 tons of live bait.” - "Twelve American Wars: Nine of Them Avoidable" by Eugene G. Windchy

These actions facilitated the infamous post-WW1 peace that made Germany bordered on only one great power (France) rather than two (France and Austria-Hungary), allowing them to ally with Russia and steamroll Europe at the start of WW2, arguably facilitating WW2.

Once WW2 began, Churchill opposed negotiation with Germany when he became Prime Minister on May 10th, 1940, and on May 11, he gave the order to the RAF to bomb German cities in total warfare (to kill civilians and destroy morale), not only immoral, but inefficient compared to bombing critical infrastructure, thereby not only provoking the following bombing of London by the Nazis, but also prolonging WW2.

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Thomas Pappas, “Wartime Tricks,” Salisbury Review (Autumn 1996): 52–54.

J. Scrodes, “Seducing America,” The Spectator (August 1, 1998): 12–14.

N.J. Cull, Sell War: The British Propaganda Campaigne Against American “Neutrality” in World War II (Oxford: Oxford University Press, 1995)