Undoubtedly you have some knowledge but I have been reading history and geography for 60 years including at University. Lets not discuss flags as symbols any more... but tell me, in your wisdom what other symbols represent colonialism and how?
 It's a vexatious issue and perhaps you can explain the destruction of paintings, photographs, books too as being colonial... or is it just destructive behaviour. The same applies to burning college buildings and libraries, schools too.