Churchills war time record,needs to be seen in relation to his peace time record,he was a war hero,but he was a failure[imo] as a peace time prime minister,he also missed a great opportunity to give Ireland its freedom during world war two[which would have saved thousands of lives in the island of Ireland],it was hardly surprising that De Velera did not trust him.
defacing anyones statue is pretty pointless,whether they are Churchill,or George W Bush,or whoever.
destroying works of art because they are not to your liking is Vandalism.