Warning off-topic tangent.
The choice between Jesus Christ and the “robber” Barbaras was a choice between two messianic figures. Barbaras was desrcibed to be a “robber” in John 18:40; however, to truly understand who he is it is necessary to understand that in the Greek the Gospels were written in “robber” had become synonymmous for “resistence fighter” thanks to the political climate of Judea at that time. Also, his name “Barbaras” means “son of the father” (up until the third century Jesus himself was referred to Jesus Barbaras - Jesus son of the Father), and when Matthew 27:16 refers to him as “a notorious prisoner” it is easy to conclude that Barbaras was a prominant leader of the resistence fighters.
Ergo, the choice between Jesus and Barbaras represents a choice between a Messiah who promises freedom through a self-won armed struggle that promises not only freedom but a real kingdom of this earth, while Jesus represents self-sacrifice, and suffering as the only way to achieve true life.