How is Booker older as old man comstock than as a regular booker?
How did Elizabeth get the power to open tears?
Why did Booker give her up in the first place
Why'd he turn to a racist SOB?
And you should put that link in the spoiler imo
Edit: so okay there are two possibilities either booker does or doesn't get baptized, if he does then he turns to comstock and if he doesn't he remains booker, for every pair there's one of the twins who will build a columbia and he'll be the leader of it and will travel to an alternate booker to steal a daughter because he can't conceive?!?!?!?! and that child from an alternate world will have super powers? and that booker will try to save her? but how did Comstock get to bookers universe or vice versa?!?! If they're the same guy there worlds should be mutually exclusive unless of course the letuce's [sp] brought booker into the other world...

but how come he didn't notice?

it would make sense why he didn't know about Columbia and all that crap that was going on in there..........