I've always believed that kindness trumps all. With the events going down in Charlottesville recently, I can also see that anger blinds.
This will be a fairly short post.
I can't think of a time in history where hatred or anger has resulted in someone's mind being changed for the good.
You have to think of folk's minds as being gardens. Your words are seeds. What you say can either save a life, or help to destroy it.
If you've seen someone at the march who you know, either through work or social media, your best course of action is to reach out. Kindly. Strike up a discussion, explain your view, be persuasive, offer up a new perspective.
You will be faced with backlash, defensiveness, anger, words meant to rile you up and get you to respond in kind. DO NOT TAKE THE BATE. This is the one time when taking the high road is your only option to help not just this person, but the world you live in.
What you say may not have immediate results...in fact, I guarantee they won't. You'll feel like crap, you'll feel like lashing out, you'll likely feel an extreme need to pummel the person you're trying to talk to. That's okay. Just don't let it show.
You're not being trampled upon. You're not sitting on the sidelines. You're not bowing out. You're doing the right thing.
Because see, you've planted a seed in that garden. It will grow ("Life finds a way.")
You may not see anything sprout for days, months, years, DECADES in some cases. But what you've said now will end up being recalled in the future. You may be able to save that person's future with the things you say now.
You might tell me, "But my anger will shame them!" and sure. It might. You might be able to shame them into converting to your point of view. Likely, you'll plant a seed of hatred that will grow larger and faster once the shock has worn off. You might've gotten people to lose their job, their families, their livelihoods, their ability to walk anywhere without getting abused. But does that sound like something that's going to help in the long run? Will they remember you with vengeance on the mind?
Be careful how you plant your seeds. What eventually grows is entirely up to you.