Then be truthful about these 'facts' - Tell people they stem from 2003 and 2007 and view points evolve over time. Tell them hindsight is 20/20 and remind them again many shias including imams of their local mosque supported Iraq invasion at that time. It would be best if they are directed to those existing thread where these issues have been discussed already so they can hear both sides and make their choice. Personally i think you are wasting your time. With Mehdi Hassan, Qazwani, Abu Thar and Ammar attending its pretty much a done deal. I would suggest you attend and take pic/videos of FBI shadows.