I read it in one of the discussion forums on this movie. One of the comments presented a few interesting anagrams of the movie's title (Shutter Island) -
Truths and Lies
Of course, most probably this is just an interesting play on the title by one of the viewers but given the important part that anagrams have played in this ...
Per this article:
With the continuing occupation of Afghanistan overtaking Vietnam as the longest war in American history, The Devil All The Time's unsparing critique couldn't come at a better time. As the film's title tells audiences, Arvin's father spent his whole life fighting because the enemy killing him was at home in America all along.