almost all the mass
No name calling, here. But some people need to read more carefully.
8000/19 = 421 killed by each attacker.
I'm sure even you can see that the murders committed by American mass murderers pale in comparison.
Yes you do. The distinction between a "mass murderer" and a serial killer is simple, if inelegant. A mass murderer does his work in big bunches, many at a time. The lowly serial killer offs one or a few at the time.
Of course, your quibble with Ann Coulter is bigger than that, isn't it?