I heard that a nazi/hate rally will be taking place at christie pits park next saturday?

Next saturday. If I decide to go and get this documented, I am going to use caution (as anyone else would) around these types of people.
Intolerance towards those not involved should be expected, maybe even a riot will break out, I have no idea if it will.
Police will obviously be there, we should hope, to maintain order and maybe prevent it from taking place, and arrest those who incite violence towards bystanders or counter-protestors (who will obviously be peaceful and present).