Previous warm periods

The biggest scam by the UN IPCC was the total elimation of the Medieval Warm Period.  Just now, I'm beginning to see it mentioned on rebuttals in the Guardian, so I looked it up.

Reference

I'm supposing these guys might be the famous 3%.  It's an interesting read in light of recent warming super-hype, wanting to change 'global warming' to 'global heating'.

I was interested in the charts, which I haven't seen before.  The mwp was characterized by growing grapes in Greenland and Northern Scotland.  We never reached that point in this 20 year cycle.
Our wonderful heat since 1850 was the recovery from the little ice age.

So, the full wave of the longer cycle is 600 years.  That should fill us with joy that we aren't plunging into a major ice age.  Perhaps after this 20 year cold-cycle, we can once again grow grapes in Greenland.