Can anyone help me with the highlited sentence?
Up until the Bolsheviks came into power in November 1917, Stalin is reported to have been arrested eight times and managed to escape from exile seven times. This seems to have been an easy feat.
There IS a bit of a contradiction in "easy feat". A "feat" by definition is something that is difficult to achieve. You might call this an oxymoron -- "parting is such sweet sorrow".
He escaped so many times that it almost became an easy feat(task) for him. Yes it is an oxymoron like 'that lady is slightly pregnant'.