I don't think it would be much of a challenge to get a party committed to explicit racism to 8 or 10 percent in Canada with a charismatic leader and decent orga

I don't think it would be much of a challenge to get a party committed to explicit racism to 8 or 10 percent in Canada with a charismatic leader and decent organizing. If lightning strikes once and you get an MP into parliament after that as a private member that MP is going to get a lot of media attention, it will immediately change politics because with large parties member discipline is important whereas in an MMP system a party that has no hope of ever winning it all has the reverse incentive - they are 100% committed to whipping up their "base" for their pet issue.