They obviously don't realise they're admitting that we've had multiple warm periods in the past.
The Medieval Warm Period. The Roman Warm Period. The Minoan Warm period. And two long Holocene Climate optima.
The only 'bittersweet' part is that the people who lived in those times weren't such fools as we are today.
Well, not all. The Romans and the US have a few parallels, and we appear to be following a similar path to perdition.
Oh but they assuredly had idiots in those days also - the difference being they hit critical mass in the 1990s, and now they are becoming the majority seeking to make idiocy the norm.
The Scythian culture started at lease 6 or 800 BCE, and the culture had pretty much died out before the time of Christ. So obviously the Roman Climate Optimum and Medieval Warm Period were not warm enough to cause the melting of their tombs and rotting of the corpses that scientists are rushing now to save. It would appear that our “global warming” is warmer than some of the earlier warmings.