Captain America the winter soldier: SPOILER ALERT but question for folks who have seen it....

[bestbefore]

Do not read if you have been dragged by your DC been to see this new film!

I really enjoyed it but was confused afterwards...

The Robert Redford character has a big plot to kill lots of people: WHY?! What's the rationale behind this decision? I just didn't understand why and how he thought the HYDRA plan would work/ what he would do next?

Anyone got a theory?