If the person representing your opinion or desired way of life is exhibiting signs of bad behavior when they do it, you can be certain that the majority of people the message is intended for will focus on the bad behavior and ignore the message.
You can cheer on the champions of your cause all you want, but if they’re not setting a good example when they represent your ideas, they’re doing more to ensure that your cause or organization will be perceived badly than they are in changing anyone’s mind.
Those who represent you aren’t doing you any favors if they’re not setting a good example when they do it. And if they’re communicating your ideas in a way that your opposition isn’t receptive to, you can be almost certain that the bad behavior is what they see, not the ideas.
Just because you agree with the message being shared doesn’t mean you should tolerate or ignore the bad behavior of the person conveying it.