I've seen Hellsing, albiet as a gift from a friend who gave me her fansub, and the fansubbing in it was iffy... bad spelling at certain points, but I was still able to understand the story. I've gotten a deeper understanding of the story after reading the first English release manga volume, and stuff online.
I've heard that there is or will be a second season of Hellsing in Japan - which is why the Hellsing we have here cuts off so at the end. What I've read about the manga online, the story goes on from the Incognito thing... what is behind the creation of Freaks is a group called Millienium, a Nazi resurgence group that is trying to ressurect the Third Reich. They do experiments and create the Freak vampires to help them in going about their goals. The Nazi stuff didnt' appear in the anime (at least not in the first season), but is in later volumes of the manga.
Alucard, as far as I know, is NOT a Christian. Not in the least. He's evil. He's actually supposed to be Dracula (Alucard/Dracula), and he is bonded to the Hellsing family by magic and some such things, back from when Integra's ansestor, Sir Helsing (a figure of English legend) bonded Alucard to himself and the family. Alucard has been "souped up" by various things of magic and science to be the Hellsing organization's weapon. They are basically using fire to fight fire, a vampire to fight vampires. The Hellsing oraganization, however, IS supposed to be Christian (though it's a bit twisted). Integra Hellsing and her group are sworn to protect the English crown and the Protestant church. They just use an evil being (Alucard) to fight evil beings.
Hellsing has a rival organization in the Vatican's Section 13, the Iscariot organization. They're an organization that fights vampires, ghouls, and oppresses pagans and those opposed to the Catholic church. They're against Hellsing because Hellsing is Protestant. Their main "weapon" is a psychotic priest named Anderson. (Besides Integra, he's my favorite Hellsing character. He's just... so psycho!).
I was talking to a friend about what the sigils on Anderson's gloves mean and what the writing on Alucard's gloves mean... and why the heck a Catholic/Christian organization would be named Iscariot (after Judas Iscariot, the betrayer).
According the the manga... the reason for "Iscariot" is pretty cool... They are the part of the Vatican/official Catholic church that isn't supposed to exist. They are a covert organization that betrays the values of Catholocism in order to protect it - that is why they are "Iscariot", they are betrayers.
According to my friend... the "Jesus Christ is in Heaven" thing on Alucard's gun and on Anderson's glove probably means "He's in Heaven so he can't see me kicking your butt!" (A false assumption, but a lot of Japanese manga-ka are weird about using Christian symbols and themes in their work). I mean, it's even like that over on this side of the pond... you have authors, artists, and filmakers who use Christian symbols and elements of Christianity without being Christian themselves and they don't have a real understanding of context. (There are Christians in Japan, I'm just saying that most of the population isn't... much like America).
A lot of the twisted Christian symbolism in the story, I think, is like a poking fun a Christianity and religion in general. The series isn't meant to be anti-Christian, it just is a basic "holy people fighting vampires" story like in a lot of horror movies and likes to make fun of its subject material. The story is a horror story peppered with quirky humor. I rather enjoy it, but there are things about it that bother me sometimes.
It is not for eveyone, and I don't even think for most people here. For instance, if Ruroken pokes her head in this topic, I warn her FAR AWAY from this series... You cannot be easily frightened or over easily offended if you want to watch it/read it. It is HORRIBLY VIOLENT, for one thing... very, very bloody, and definitely not for the squeamish. (Personally, I enjoy this aspect a lot. I weirdly... like blood and a certain degree of goriness). When I was watching the first episodes of the series, I was all sitting in my chair, kicking my feet in delight and thinking "BLOOOOOOOOOOD!" But, I'm weird, so don't mind me...
So, yeah, not for everyone, I warn most Christians away from it (only watch it if you can put aside the twisted symbolism and the Protestants and Catholics out to kill each other while they kill ghouls and vampires), and it's definitely for mature audiences only. Don't show this one to the kiddies. There's my input.
Oh, and by the way, here's what I got on the Hellsing character selector on the Hellsing . nu site: