Janissy,
That sounds like an Aspie obsession
Yes, it's clear to me that Spielberg tried to give a certain Jesus apparance to ET, though I've read on Wikipedia that Spielberg strongly denies it, claiming that he couldn't do that to his (Jewish) mom. I hadn't thought about the death and resurrection thing, you're right. But Elliot with the white blanket does look like an apostle or something.
Elliot, like you, acts like a bridge in the understanding between the humans and the aliens That's the part I like best in the movie - the learning to understand each other, from scratch. No assumptions are possible at all. Everything has to be learned from zero, actions that look the same have different motivations behind them. It takes enormeous mind openness to understand the mistakes Eg: it's not ET's intention to be "naughty" and get drunk, but the reason he discards the white cheese and chooses the beer is that it's the only thing that Elliot taught him how to ingest (when he demonstrated how to drink from the can of coke to him.)
As a Linguist and English teacher, I love the way that ET learns English in the so-called "Direct Approach" (not in use anymore, but needed when there's no known language to translate the new words to). He applies the rules of what's called "distribution": he hears the word and infers its meaning from the situation (context), so at the end he says "come", because that's the word he knows humans use when they want someone to join them somewhere.
The two important things I learned from the movie are: when I've no idea how to communicate with an NT at all - pace and mimic. That always works. ET seems to me like he was not a child but a grown-up alien who knew a thing or two about communication. The first thing he does in order to create a relationship with Elliot is to MIMIC Elliot's actions (deposit the candy on a surface). Then immediately, he starts pacing Elliot (I forget now how).
The reason a movie becomes a classic is when it trascends the entertainment relevance and has so many quality elements in it that you can watch it a hundred times and still learn something new from it. This is one of those movies. Spielberg's success secret, imo, is that he gets the best professionals for each job. Among many others, the movie has Linguistics, Language learning and Sociology research relevance behind it (the writer of the story did high level homework, it's evident). Those are the fields that interest me in particular, but I imagine there's research relevance in many other fields too.
_________________
So-called white lies are like fake jewelry. Adorn yourself with them if you must, but expect to look cheap to a connoisseur.