He was depressed and psychotic, then outside events (and Trump) sent him over the edge. They’re probably working on that narrative right now.
The leadership of Canadian police forces, whether it be Toronto or the RCMP are extremely politicized, so I have no doubt you are right. Head of the RCMP will get his marching orders from Trudeau, and that will be to not “speculate” as to whether Islamic terror played a role.