What detracts from a DEAD politician's greatness?

[AussieMick]

The above 3 posts seem to me to be linked in the way that Churchill's greatness has suffered in the UK (and also in Australia and NZ) over Gallipoli. To remind you, this was an attempt in 1915 to shorten WW1 by invading Turkey.
It was a disaster mainly due to poor planning (though that covers a host of issues). It was fundamentally Churchill's idea and the outcome was 160,000 casualties for the Allies , and about the same for the Turks, before the Allies withdrew.
The point for me is that Churchill made a strategic decision that was soundly based (I believe) but in the build up and over the months it was altered and poorly actioned by senior command. He resigned and the Gallipoli 'disaster' has forever since been placed as his responsibility.

My opinion is that many of Churchill's critics concerning Gallipoli are political professionals who dislike him for being an old-style Conservative. The fact that he took actions which British Trade Unions remember with hatred also affect the bias of those on the Left. When you couple this with the hatred which many people of Irish background have for him, its no wonder that Churchill's greatness as a politician is subject to much bitterness.