Churchill was pretty ruthless; I'm thinking mainly about the Q Ships here. He commissioned civilian ships for the purpose of ramming U boats so that they could no longer surface and demand surrrender.
Wrong. Q ships were equipped with guns for the purpose of sinking U boats.
Of course if the submarine was very close and the Q ship gun could not be depressed low enough, then ramming would be used instead.
This, of course, meant that the Germans started to attack merchant ships without allowing the crew and passengers to escape.
Merchant ships would radio the position of a spotted surfaced submarine.
So because of (Q ships AND because of radios) it became safer for the submarine to torpedo without surfacing and move away from that position.
His policy resulted in the vast casualties of the U Boat war.
The German policy of targeting merchant, rather than naval, shipping
created the vast casualties of the U Boat war. In so much as much of
this was neutral shipping and not carrying war related goods and not in
the vicinity of Britain, that was tantamount to piracy and a war crime.
Submarine commanders were not hung at Nurembourg like tribunals merely
because the allies had responded by sinking any shipping in a patrol
area too and were honest enough to defer from hypocritical executions.
Not impressed by insults about Churchill in Polonium poisoning thread.