***It's wrong anyway - NASA have 2005, 1998, 2002, 2003 and 2004 (in that order) as the warmest years on record,***
NASA of course have records that go all the way back to the Roman Warm Period? Um, no, just for a few of the most recent years. Even the CET record only goes back 260 years, right into the depths of the Little Ice Age. By quoting NASA you are cherry picking as much as the original comment, but you are also arguing from authority which is a common fallacy.
***The MWP was not warmer than the current period, it was drier and it was a localised effect.***
If you can deign to read a "sceptical" site, may I suggest you check out http://www.co2science.org/data/timemap/mwpmap.html to see the studies regarding the MWP. Links are included to at least abstracts of the papers. It looks pretty global to me.
***Sea ice in the Arctic is thinning and diminishing,***
http://noconsensus.wordpress.com/2009/06/16/historic-variation-in-arctic-ice-tony-b/ gives a nice overview of historic records. It again may be best to follow the links to the original documents whenever possible. It appears as though the recent ice loss in the Arctic is not unusual or unprecedented.
***So the ice in the Himalayas isn't going as fast as one report says. But the evidence is clear, the vast majority of Himalayan glaciers are retreating.***
A quick search on Himalayan Glacier Retreat and ignoring the IPCC reports but only taking independent specialist reports suggests that although the glaciers may have been retreating since 1850 (about the end of the Little Ice Age) there generally is consensus that there is insufficient evidence to make a statement one way or the other.
***Yes the climate has always changed, but its rarely been changing as fast as it is now in human history***
Implicit in this statement is that climate has previously changed as fast as it is now (assuming that the observed change is not due to some artifact). The question becomes "what caused these obviously non-human climate changes in the past, and why is the present change necessarily human-caused? Without valid answers all we can state is that present climate change is not distinguishable from other natural climate change.
Science is not about taking an hypothesis and assuming it to be true, but formulating the hypothesis and the trying to disprove it. Failure to disprove the hypothesis strengthens the supposition that it is "correct", but it is still susceptible to being disproved at any time. An hypothesis cannot be "proved" but can be disproved with one contrary observation.