@Sagippio:
So far from my own reading of the script provided by Kiavik, Arlong told the marine the truth, that if FT didn't refuse the transfusion, he would survive. And then Arlong said it was humans who drove FT to do such thing.
But the newspaper says that FT was refused the transfusion by humans. So it's the newspaper (WG) who lies. [In the script it is written "ningen ni kenketsu wo kyohi sare" (was refused blood transfusion by humans). "sare" is usually passive form, though sometimes used in polite form. I assumed it's in passive form (to be refused/denied/rejected).]
Aladdin (I think) is talking about FT's last will of trying not to be hateful towards humans, that just like Otohime, he also thinks that fishfolks, merfolks and humans should live in peace. FT even tried to love them but failed. Aladdin then said that it was because FT was betrayed by humans (that he couldn't accept blood from humans), and that FT's past of being a slave makes the situation more tragic. Saying things (the "lie") that FT asked (newspaper's readers might even think he begged) for blood transfusion, when he didn't want to, and then rejected, would really tarnish FT's honor.
Well, that's what I get from the script. Hope someone (Aohige?) will clarify this soon.
I guess I'll use your post to try and make some points.
First is why I said Slavery. You see being a slave is something that Tiger kept to himself until the moment of his death, he didn't even tell Neptune about it, which tells you how much of a pain it was to him. Now there was no reason for Arlong to tell the WG about the betrayal because they, WG, were the ones who set it all up. And the WG, surprisingly and smartly, hid that fact from the public so they don't create any sort of hatred between Merfolks and humans/WG.
True, that him refusing blood of humans would, maybe, looked bad but let's not forget that he's a fishman and they don't really like humans that much. Someone will tell me that if the WG announced the truth it may result in hatred from humans to Tiger/Merfolks or set up a bad example for the people of Fishmen Island to refuse any sort of human help. Of course I would have to agree with that, partially.
Ahh, but you see, thankfully we have our buddies, the WG, to do just that. Them announcing that humans refused to help Tiger only caused a resentment from Merfolks towards humans, which really ruined what they tried to do before by hiding the betrayal thing.
One more thing… Ok I'm done.