No one ever did mitzvos to please bar kochva.
No one said that bar kochva was the greatest jew to live.
No one carried around pictures of hin thinking that he will protect them after his death.
No one followed him after his death.
No one prayed to him when they were in trouble.
No one thought that bar kochva knew their thoughts
No one said that bar kochva is the essence of god wrapped in a body.