Ok, so - since I'll have time to begin with BG 2 this weekend I wanted to recap a bit of the story from BG 1.

And so I wonder:
Why did Sarevok want to kill Gorion and me? Gorion wanted to stop him - but his ward, his half-brother?

And the people of the Iron Throne ... those people were basically (relatively) harmless white collar criminals who just followed Sarevok because they (wrongly) thought he would inflate the prizes for iron, right?

And Sarevok wanted to become the new Bhaal. But if Sarevok wanted to become the new Bhaal ... he also worked against Bhaal's wish, who rather made children in order to resurrect ... in their body? Somehow? Right?

I think it was Highlander-ish "There can be only one" type of thing. But it's been a several years since I finished that one, so I await Hickory's answer. :)

Bhaal's plan in seeding the realm with his 'offspring' was that they would carry his essence, but ultimately all destroy themselves, allowing Amelyssan, his high priestess, to perform a ritual to unite his essence and bring him back -- it was never his intention that any should survive. Sarevok studied the writings and prophesies carefully, as did the other 'big five' Bhaalspawn, so he knew that all others, including PC, were a threat to be eliminated if he ever wanted to usurp Bhaal's throne. So no, it was never "Bhaal's wish", as you put it.

Oh okay. Thanks.
And yeah, that makes sense then of course.

I don't think I knew any of that after I completed BG1. I don't remember what i thought it ended kind of abruptly but the cut scene told you there were plenty of other like you and Sarevok. I should have payed more attention to dialogues in candlekeep because I think thats where they were talking about prophecies.

The final cutscene is a pretty good clue, though it presumably overplays it a good deal, unless Bhaal was a very busy bee.

Actually, the last thing was the big secret from Amelyssan, no one from the bhaalspawn knew about their purpose was to die for Bhaal returns (though the massive children homicide from where the Gorion's ward and Sarevok are saved was a good tip).
All the bhaalspawns relevant to the history though they could become the new Bhaal (Sarevok and evil Gorion's ward) or to resurrected him without dying (The five minus the monk) or just wanted to stop the risk of Bhaal returning (The monk and.. neutral/good Gorion's ward?).

Sarevook didn't had Amelyssan knowledge and his conclusions were wrong: total war (and deaths, A LOT OF deaths of normal mortals) would giving him all the power he wanted but the other children could steal this power (instead of: My power will grow as I kill the other children). For the Gorion's ward that difference is useless, and for the towns destroyed in the process too . Is never stated on that detail in the first game, the ending is very simple: ALL This chaos you just played, is one of the many that are happening right now. In the second game is ignored as as someone steal your goodness essence. Is until the expansion, throne of Bhaal, that the prophecy is explained (and executed).

Nothing is written down hard and fast, as "this is how it happened", especially in the video game. Most details are inferred or implied. For example, it is explicitly stated that Sarevok spent many years researching Alaundo's prophecies, and availed himself of the knowledge in Candlekeep to this end, but not for what reason. He certainly was not researching "total war and death" -- he wouldn't need Alaundo's prophecies -- and it is beyond any doubt that the big five knew exactly what was portended; they would have had no other reason to specifically search each other out for elimination. This was a very carefully executed series of events charting a very specific purpose.

Maybe, but this part is cannon inside of the game, as is part of Sarevok's diary (Wiki url) At least they made a new pre-sequel or a book override them, this is the cannon for those games.

More importantly, why on earth didn't Sarevok kill Gorion's ward when he had the chance right there and then after Candlekeep

I want to do another BG1 play through especially with the new expansion coming out. But I should probably take a D&D pallet cleanser first. Maybe something with some guns.

Apparently there are cannons in BG1, so try that? :D

Gorion held him off and the PC runs away. I suppose it can be assumed that he looks around for you and you made an epic Hide In Shadows check.
I'm getting read to do the same. I picked up the EEs this week. I haven't played IWD in many, many, many years. After I tried it the other day, I can't remember any of it (except a cave early on with skeletons - I got there already). Anyoots, it's a fun blast from the past. After IWD, I plan to tackle BG again with the BG1 expansion coming out. Hopefully they have BG3 by the time I'm done with that.

Also, I hope they make it good. They have some stiff competition.

Remember the cryptic opening cutscene. Sarevok says, "I will be the last, and you will go first!"
He basically wanted to be the only son of Bhaal, the one to bring about his resurrection. Also, he believed he gained more power by killing, hence the war between Baldgur's Gate and Amn.