Dead Island/Dead Island Riptide Clarifications *SPOILERS INSIDE

Guys saw that they announced Dead Island 2, I would like to have some clarification though the clear but I would like to know other things I have question marks.

1) Sinamoi But what happened? The thing that I never understood in Dead Island, help him in every way but after we leave there without reason, that is NOT what I have never understood this, we have made every thing for the group of Sinamoi, and then leave them there to die . (?)

2)Yerema and Caronte you what happened? Are taken by the military (beginning Dead Riptide), and then you do not know anything, they are dead or have been taken away for research on Yerema? Or Caronte has remained on the ship and killed by zombies and Yerema brought into another part to be studied? It must have been her cause in California the zombie outbreak? (Dead Island 2)

3) And those in the church who happened to them? I believe that you are dead and theory that you have given?

4)The 4 Immune in final Dead Island Riptide you understand that zombies have become uncontrollable (such as Harlow).
Stop! I know you're thinking, "I have become Zombie" Oh yes, because if you heard exactly what he said Harlow, Serpo and the scientist (I do not remember the name lol) say the same thing, Harlow (dying) "You must not leave the 'island .... you are the angels of death "referring to going into other areas of non-infected and that if they will infect us all.
Serpo (before it dies) "Get help! Do not you know what you're going against, do not ever be controlling anger," and the scientist also said that they are not immune to the virus but are more resistant to infection.
There is also a little hint at the end of the game Purna "It hurts a bit the head but I'm fine" is the contagion that is spreading in her, remember that the story is taken from 4-5 immune.
So they have become zombies, too.

5) Do you think the boat approaches the pier at the end of dead island riptide, is California? (Dead Island 2) And the beginning of the infection has started to blame the 5 immune?

6) The islands Banoi and Palanai were bombed on Dead Island 2?

I made these theories and I would also like some clarification on some questions I have asked above, and also to lose a little time with you, and especially to know your theories. :)

I also had other theories but I do not come to mind, if I remember write them here. :)