>>851585
The story revolves around an occult brotherhood trying to escape from the current plane of existence. The two symbols you see in the opening are the Qliphoth and the Sefirot diagrams. Without getting into the details, they are essentially the map of how they plan to 'escape' God, who they believe is not the true God. It is essentially a story about the people who run the world manipulating things behind the scenes to bring about their goal, SELEE is just the name in the story used to represent them.
Unfortunately in real life, '♄hey' don't have a single organization you can point to and say, "that's ♄hem!" but there is a common denominator between all of '♄hem' that you could point to ;).
I wouldn't worry about it too much, they think they can defeat God and they will be proven wrong. We, the meek, are far better off then those rich pedophiles and their 'enlightenment'. If you want a Christian message from EVA it would be that the angels are the good guys sent by God to punish the bad guys but overall, it is not a Christian story, it's a Kabbalistic one.