User blog comment:D.Dragon123/Monkey D Gr/@comment-4094276-20110729204339

I am going to go with the WG (perhaps the Tenryūbito) killing Dragon's wife as to why he became a revolutionary, then later realizing the full horror of the WG. There has to be a reason why he was at Roger's execution, Dragon's wife being Roger's sister is not a bad theory, but i think it is also possible he was on Roger's crew. Which is why Garp was always so pissed off at Luffy for saying he wanted to be a pirate (because he did not want to have another son become a pirate). Dragon being a pirate would also explain why his wife was killed, perhaps the WG tracked her down and killed her (similar to what they tried to do to Roger's wife, Rouge), but Garp was able to save Luffy and hide him in Foosha Village.

What do you think?