Did somebody interrupt her, and that's the best proof you can come up with of your assertion "There are highly trained scientists who don't fully support the party line, and they are not allowed to speak."
Being highly criticized by your peers is not the same as not being allowed to speak.
Do you have any better examples of scientists who were not allowed to speak -- perhaps a scientist who hasn't actually testified in front of Congress on live national television, written an op-ed for the Wall Street Journal, boasts of having a total of 12,000 citations of her publications, and a blog that gets on average about 12,000 ‘hits’ per day, and 300-400 comments?
Or is that all you've got?