I think the real argument against what Snowden did was that he gave journalists way too much information on certain topics, relative to what one could argue are

I think the real argument against what Snowden did was that he gave journalists way too much information on certain topics, relative to what one could argue are "legitimate" operations of the NSA. The fact that the NSA is spying on foreign leaders seems pretty straightforward, and basically in their job description. I think this argument holds a lot less strongly than it did with what Manning released (notably the cables that listed "infrastructure weak points" that would basically be a list of high-value targets for anyone looking to do pain to the allies of the US. Things like schools and pipelines). But it's a question of where you think the line lies in "legitimate" surveillance. But if you don't think it makes sense for the NSA to be spying on Chinese research institutions, for example (if only to keep tabs on Chinese military research), then I don't know if you have any task that the NSA could do given its mission statement. Obviously a balanced position, but I think most people in the US believe some spying infrastructure is necessary.