When you constantly get villainized for being involved, that makes it a lot harder to justify to the populace that these things are worth doing. People actually do listen, but not always in the way one intended. At this point, is it any wonder that much of the populace is now convinced that non-involvement is the moral choice? (And I say this as someone who fears this state of affairs)

>When you constantly get villainized for being involved

The vagueness of "being involved" is doing a lot of work in your comment. How often is the US vilified for these humanitarian programs and why should we pay attention to anyone who vilifies something that is obviously doing good in the world?