As I said, I'm not from Canada so I don't know the character of the proponents any more than that of the website opposing it. I can see what the proponents' politics are, so I give the website the benefit of the doubt. But a website made to convince someone that they should oppose a law can't rely on the reader already distrusting the proposers.
It's good to be cynical, but that shouldn't mean blindly trusting what 'your' people say.