Any guilt is not because i think i could have likely changed anything. It is being ignorant of what was occurring under our noses and not saying something at the time whether it could have been changed or not.
Not actually true. Protest and civil disobedience by enough people for just causes has changed policy many times other than at elections. All it takes for evil to triumph is for good people to do nothing - exactly what happened with the schools for many years.
Who one voted for is irrelevant. As a citizen of Canada it our duty to hold our government to account whether they are your party or not. Existing in ignorance and/or not trying to change actions that are wrong and in this case possibly criminal is an abdication of that duty. Whether or not you can actually change the actions of those in power is secondary as failing to try is failing in your duty. That is where the guilt lies - we should have said/did something whether it could have changed things or not.
As do I. The way to do that is to learn from history and to speak out when things are wrong. The entire residential school program was wrong and is not something we can fully blame on our ancestors. Comparing to other wrongs in history and stating well look what they did is a "strawman" and is akin to what kids do when they get caught. Like the 8 year old that says "but look what Bobby did." Compounding wrongs never works - the old saying "two wrongs don't make a right."