Yes and no, Kilt.
You are correct that that is how past ice ages have started. When the thermohaline current (which is slowing down currently and which is driven by the fresh water from Arctic ice melting) stops, then the non-latitude-appropriate-warming of Europe will stop. This, however, is vastly unlikely to produce an ice age this time. It will be something of a moot point for us poor souls living in Europe, which will be hit by a localized mini ice age. But for the rest of the world there will be even greater warming - from the thermohaline heat which should have bathed Europe. (Incidentally that current slightly cools America's eastern states at the moment. So, New York and Boston could get some very warm surprises.)
But this is not an ice-age. In fact, the effects of our emissions probably prevented one way back when we first discovered fire, and our emissions were a tiny fraction of what they are now. http://arstechnica.com/science/2016/01/we-narrowly-missed-a-new-ice-age-and-now-we-wont-see-one-for-a-long-time/" rel="nofollow - http://arstechnica.com/science/2016/01/we-narrowly-missed-a-new-ice-age-and-now-we-wont-see-one-for-a-long-time/ (As a point of interest, this work is by VERY well respected scientists.)
This is not because our CO2 emissions cause a huge effect, but because the system that they effect is was very finely balanced.
So, overall, now our emissions have increased even more, we are in for a rough ride, vastly hotter for the most part, but also with changed patterns which produce localized, droughts, floods, winds hurricanes, cooling and other unexpected horrors - including localized hot-spots which could be ghastly.
The total heat need not be too big a challenge - for the prepared, The carboniferous was quite survivable after all. But, the destabilization of the weather patterns is, frankly, absolutely terrifying. Accurate weather prediction renders: farming effective, airplane travel safe, shipping safer, fishing possible and supports many other benefits of our civilization (how many power outages are caused by high winds and snow?). Another problem is the kinking of the jet stream. As the circumpolar winds are driven by the temperature differential between the arctic and the sub arctic, they get weaker and kinkier. This can crash hot air into cold air. That produces, torrential rain, fog and/or snow - lots of snow.
Changing coastlines, famine, displaced people and the diseases they carry, destructive weather, which renders those sufficiently inland to avoid the sea, homeless and the rampant spread of mosquitoes* are just a few of the joys to come.
*During the carboniferous period, when the carbon we are currently re-releasing was laid down, insects grew to gigantic proportions. Dragonflies with meter long wingspans for instance, ruled the skies. Imagine that for mosquitoes! AAAAAGH!
------------- How do you tell if a politician is lying? His lips or pen are moving.
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