Vince is a business man and gives a fuck about the bottom line, and that is why I don't think he hates Christian, just that he made a dollars and cents move.
The bottom line is the last time Christian was the man on the brand, be it ECW, he was the lowest drawing champ in their history. The ratings were higher with a rookie in Swagger holding it, dropped when Christian won, went back up when Dreamer won, and then dropped again with Christian until the brand died. Christian is no draw. He is not obscenely over with the casuals like even Matt Hardy as a face. Yeah the people popped for the win, but they popped because it was all about Edge who has always been more over and well received by the majority of the fans, not just the internet.
I don't get how people can say he never cared about Christian or doesn't like him. They spent forever getting his ass over early in his career. All the TLC wars, the tag title reigns, the turn on Edge, unretiring the IC belt, the feud with DDP who was more over, the cheap heat as part of the Un-Americans, the rub from Trish who was more over, Tomko, the pairing with Jericho who was more over, and the rubs from Rock to start off his Captain Charisma gimmick. You know what though? When they finally got him over as a heel his ass jumped ship and left SD in shambles with Dave hurt, Taker banged up, and Eddie dying. He left Vince high and dry after years of work on his character and taking a chance on a young, puny kid from Canada in the first place when the other organizations in WCW and ECW didn't bite. As much as people always can say well TNA did this or that for him, it boils down to the fact that he turned his back on them by choice unlike Kurt, Booker, Jeff the first time, and others who were given walking papers.
To the TNA made him, so WWE is holding back to prove a point folks. TNA used his WWE character, WWE gear, and they put the NWA strap on him. However, as soon as they got the likes of Kurt, Sting, Steiner, Booker, and those guys signed he was demoted down to upper midcard of that promotion. In fact he never won the TNA title when they made the switch of belts because they had to drop the NWA one.
He left TNA and went back to WWE. The fans greeted him nicely, not greatly but nicely. He didn't get the return reaction of a Jeff Hardy. Hell he didn't get the return reaction of a Matt Hardy. He has never given Vince a business reason to push him as a top guy as it relates to being a draw, moving merch, and being insanely over by himself as a face on week in and week out basis.
He got the strap as a courtesy to Edge, and to act like it is a slight for him to drop it 2, technically speaking 5 days later is a joke when the likes of Piper, Perfect, and DiBiase never got to have it for even 2 seconds. Plus you don't even know if there is a heel turn planned, which is possible since you can at least hide the fact that he doesn't sell as a heel chasing or protecting the title against a hot face in Orton, much like they have done with Jericho in the past.