Because they're scientists. This is obviously difficult for you to understand, but just because you get government funding, doesn't mean your studies are therefore prejudiced and bad science. You need to actually read the papers, understand the science and then judge them on their merits. I assume you saw John Halpern's recent study which was widely reported as showing ecstasy did not have any significant effects on cognitive performance:
http://www.guardian.co.uk/society/2011/feb/19/ecstasy-harm-brain-new-study
http://www.ncbi.nlm.nih.gov/pubmed/21205042
Guess who that was funded by? The US government, via NIDA and NIH.
Yes, Ricaute's lab where they used methamphetamine rather than MDMA.
http://www.maps.org/mdma/studyresponse.html
That was six years ago, not really recently. You can't use one bad experiment to reject all studies. There are plenty of studies that show MDMA is a neurotoxin, and plenty of debate over at what doses, and what that neurotoxicity means. MDMA isn't the issue here though, I agree that MDMA is relatively safe. What is at issue here is new, untested substances.
No, I don't think he was hand picked. The politics of the ACMD are not simple. While I might disagree with Dr Iversen on plenty of things, I certainly do rate him as a scientist, and yes he has independent views. I know you would love things to be black and white - Nutt goody, Iversen baddy - but the real world isn't as simplistic as that. The evidence doesn't even support your theory - as previously noted the ACMD recommended decriminalisation, and your response to that is to say that he wasn't involved in it? Come on.
Seriously, read his book, rather than sticking your head in the sand.
Right, and no one is suggesting that "E causes Parkinsons". However, methamphetamine does increase the incidence of Parkinsons - and mephedrone's method of action is quite similar to meth's.
Have you read all the stuff in the mephedrone science thread? Do you think that's all home office propaganda?