If the standard is that a political position can be dismissed by pointing to scandals, bad conduct, or offensive statements by people associated with it, then that standard has to apply equally.
Many of the same people attacking Alberta independence have openly supported the Liberal Party and the current federal government. That government has its own record of serious controversies: blackface, ethics violations, paid vacations, SNC-Lavalin, ArriveCAN, and the Emergencies Act response to the trucker protests, which a Federal Court later found unreasonable and unconstitutional.
But I do not say that every Liberal voter is responsible for every Liberal scandal.
So why should every person who supports an Alberta referendum be made responsible for every controversial person who also supports separation?
If someone broke the law, investigate it. If someone said something offensive, criticize it. But that is not a substitute for debating the actual question.
The issue is whether Albertans should be allowed to vote on their political future, and whether Canada would negotiate fairly if they gave a clear answer.
A political movement should be judged on its ideas and proposals, not solely on the statements or actions of particular individuals who support it.