How to Identify ISIS Supporters on Twitter

I was looking at how to identify ISIS supporters on Twitter. I built a classifier that would detect that black flag of ISIS. In a very short period of time, I was able to build up a database of two or three thousand extremist accounts. And part of it as well was asking the question of like the six degrees of Kevin Bacon. So I wanted to know how far away the nearest terrorist was in my social network. This is a big deal because this is a terrorist group that has people from all walks of life,. speak all kinds of different languages.