That is not true.  People are supposed to schedule peaceful demonstrations in advance otherwise they are illegal.  Nothing can be erected on parliament hill without permission.  Police were doing their job.  They don't know a native from a terrorist, plus why can't a native be a terrorist anyway?  If they wanted a ceremonial teepee for Canada Day i'm sure it would have been welcomed with open arms had they mentioned it previously.  You know they have been planning this for a while and were hoping for confrontation to make a point that we don't want their teepee.  The fact is a teepee for Canada day would have been acceptable but then nobody would hear about it.  Just making  scene for no real reason.