He was right because he was protecting his land and people living on the land. He knew that he was a threat for his land's future. Metis have send many notes and list of rules they need but still the Canadian government was coming and being rude with metis
He was wrong to execute Thomas scott. Luis riel should have thrown Thomas Scott into a jail and ask him why he is so rude and why they dont listen to their suggestions. The Canadian government are the ones who sent Thomas Scott to Red river and claim it to Canadian's. If the Canadian government would listen to Metis, Thomas Scott wouldn't had been excecuted.
Hope this helped. >.< ( > _ < )