Nice link, some of them might point out some interesting thing.
But, I must clearfy some info in that link.
Do you all remmember the sorcerer's stone from Harry potter?
The sorcerer's stone is the same as Philosopher's Stone in real alchemy.
I am talking about nonfiction at this point.
Alchemists have two goals. One is making gold out of lead ,and the other is making elixir. Elixir is a substance that can give immortal life or at least extend life.
People believe that philosopher's stone wil create medicine that can cure any disease and extend people's life. In harry potter, the sorcerer' stone can create elixir. they use only different name. Talking about gold, chemist in the present time can change gold into lead. we, chemists and pharmacists call it "Alchemist Nightmare"
In FMA, it is different. The philosopher's stone has ultra super power that can do anything. Most of all, the motif is differernt b/t FMA and real world.
Hohenheim is more like medicine expert (pharmacologist) than alchemist. Many medical scientists fallen into alchemy and ocult because of the limitation of medical technology and knowledge at the dark age, and church also lost faith from its believers because of their immoral action towards commoners.
Homuculus supposed to be an artificial life form, which only can exist in an isolated area, which does not contain air in its space. I study in the medical field, so I read many ridiculous medical things during my free time. it is enjoyable because they are so funny.
My main point is that we might expect Hohenheim as bad guy, but who knows, it can only be decided by story writer. Most of characters are from real books. Dante, Hohenheim, and some of them, not everyone.
we will see
And I hope my words can help people.