M2 - It's not all the pro-JSF posters, NaB and Engines are pretty much in favour of the program and are reasonable people who don't mind discussion. But there's a claque of mostly Australian* JSF fans who infest a lot of boards and blogs and who aren't interested in any kind of debate.
For example, note how Spaz posts lots of stuff but doesn't answer the question.
* At least, they say they are Australian.