Just because they are not openly violent, does not make them less dangerous, in fact they may be MORE dangerous, because their weapons are our own touchy feely PC laws.
I don't understand why you are so excited by THIS conference these same groups have been holding these "conferences" which are know to actually be places to exchange information and network for 20 years, this isn't even the first one in Chicago.
From article:
A group committed to establishing an international Islamic empire and reportedly linked to Al Qaeda is stepping up its Western recruitment efforts by holding its
first official conference in the U.S.
This groups message is a jihad recruiting party, out in the open, and advertised.
Sure the other groups have been around a while, but they whitewash their topics for the PC.
This group could care less about being PC now that BHO has apologized and is enabling cultural diversity.