It's already exposed. What is it doing? People condemning him? For reasonable people yes, but for those seeking him out? They'll find him even easier if he's given more opportunities and more chances to spout hate. He can say what he wishes where ever he wishes. But that doesn't mean we have to stand for it. You want to say that fighting him or showing that there is consequences for outright hate would give him ammo? What about the people who already see him as evil? Does it not also give them ammo as there is someone who will stand up and fight evil in the most base of instincts that anyone can understand? Words are the weapon of the civilized, but a one on one physical confrontation is a universal language that everyone can understand regardless of language, creed, race, religion, ethnicity or gender.
Did Open carry disappear in California because Martin Luther King Jr cupcaked his ass with words? No. It disappeared because minorities started fighting and Malcom X started using the laws to his advantage to force hateful white people to reappraise what they believed was status quo. Both types are needed. You can't win with just words. You have to make it physical. What good is a moral victory if you're destroyed in the process?