The villains, (SEELE) a secret organization who secretly control world governments, want to fuse all humans in to one to bring back their satanic god.
Now look at whats happening. They want to fuse men and women with transgenderism and nonbinary shit, they want to fuse countries and remove borders and create a one world government and they want to fuse races with race mixing.
I would say you should watch the Rebuild films ESPECIALLY because you're an Asuka-fag because I personally feel like they give her more character development in the films (as with every character).
Don't be disappointed with who Shinji ends up with, I know that was actually the biggest discontent with the community at the end than the actual ending, everyone kind of felt content once this song played and learnt what the lyrics meant.