Ever since some of the Turkic groups that lived on the other side of Persia converted to Nestorian Christianity, Christians had always hoped for for some rear attack on whatever empire was threatening them from the Middle East. The Mongols were the next in this line. Though the Mongols were clever - they just pitted their enemies against each other. Nothing like saying 'we're here to help you' and then sack a few cities. ;)

But it still holds true, IIRC some Armenian contingents were put under the control of Mongol armies voluntarily during some campaigns against the Mumluks (or another group..I forget, gah!) at one point. I forget what city that was near...if someone wants to know more I can bother to look up for the source. :P

Anyway, long story short, M2 is ridiculously inaccurate, yes.