Constant fear-mongering and threat inflation do eventually have an effect on public opinion:

More Republicans than Democrats Say U.S. Does Too Little on Global Problems

As we can see from these results, the increase among those saying that the U.S. does “too little” comes mostly from Republicans, and even among Republicans most say that the U.S. does too much or does the right amount. There is more demand for greater activism than there was nine months ago, but the vast majority of Americans still doesn’t want a more activist foreign policy.  Despite the steady drumbeat for more aggressive U.S. measures in various foreign conflicts, more than two-thirds of Democrats and independents still think the U.S. is doing as much as it should or more than it should to help “solve” world problems. Overall, 63% of all Americans hold those two positions. While a slim majority of respondents in the survey says that they think Obama is not being “tough enough” in his handling of foreign policy and national security issues, a much larger majority also clearly doesn’t want the U.S. to be more involved in trying to resolve foreign conflicts than it is.