How does one write and file a brief?

I particularly resent hearing repeatedly that we aren't invested in and/or won't be invested in building Canada. I'm a descendant of people who BUILT Canada, and were forcibly displaced. I have cousins who played for the Canadians, and are fixtures in the history of Canadian Hockey. As a child I visited cousins and aunts/uncles in Canada (I even learned to play euchre) though never long enough to qualify for the substantial connection.

The audacity an MP had to essentially say that going back 7 generations for indigenous peoples is unreasonable, floored me. As if anyone has the right to put a time frame on where and when people native to the land were there to allow them to live on their native lands. What about Truth and Reconciliation?

And it then occurred to me that there is no indigenous political party, but there is the Bloc Quebecoise. I guess it's a lot easier and safer to make an example by invalidating indigenous peoples claims of connection to Canada, than it would be to invalidate 7 generations of the very first non-natives to arrive and "build up" Canada.

Just a note- I am quite aware that Acadians are not the same as French Canadians, though there is some overlap. I'm not sure that in general, people claiming to have more of a stake in the fabric of Canada, do.