R2-918 said:
"[Uncle Owen] didn't hold your father's ideals - he thought he should have stayed behind and not gotten involved."

Theres some good info about Owen Lars at the Star Wars.com Databank:

http://www.starwars.com/databank/character/owenlars/index.html

Apparently Owen thought Anakin should have stayed with his mother on Tatooine and not gotten involved with the Republic or the Jedi because of the affect Owen seen on his step-mother Shimi of being without Anakin.

Well that nice. Too bad Owen's thoughts aren't actually in the film and we need 3rd party source to clarify that.