It's no surprise to me that Hubbard thought that Christ was an "implant," or that there "was no Christ" or that Christ was a lover of young boys and so on.
He also said that his "good friend" Aliester Crowley had some amazing viewpoints "splendid aesthetics." "Do as thou wilt shall be the whole of the Law," something that Hubbard himself was very adept at.
http://www.youtube.com/watch?v=q6fwzOYoAfY
http://en.wikipedia.org/wiki/Thelema
And how about Hubbard's relationship with jack Parsons and his involvement with the OTO? Hubbard's participation in the ritual of Babylon Working?
http://en.wikipedia.org/wiki/Jack_Parsons
It doesn't surprise me at all that Hubbard would incorporate any of these viewpoints about Chritianity or Christ in his own brand of religion. In fact, if you do your own looking, I bet you'd find a lot of Crowley contained in Scientology. It's really easy to find too.
I'm sure some of you will just say, "But it works, and that's all that matters."
Oh well, your life is your own path. Do as thou wilt.