Pick a slogan with an obvious interpretation, tell everyone it isn't what you mean, tell everyone that the only people that really mean it are outliers, continue to push it hoping it really comes true.
A protest march and slogan graffiti aren't invitations to come converse, they are statements. Most of the people I meet might have vague sympathies for these messages but don't participate and obviously don't have those views.
When I see people shouting at each other in the street (in my own experience), chanting on megaphones, businesses boarding up their windows, and people piling trash on the street to keep police and others away... it isn't exactly an invitation to come see what people are about.
It's especially manipulative doublespeak. Say one thing, mean another, and demean anybody who dares to take your message at face value.
I'm judging people with what I see. I see the actual movement with either vague messages that are hard to interpret as not extreme and specific messages that are impossible to interpret any other way. The only people I see trying to have the "reasonable" message are folks online acting as apologists for the protests trying to defend what they "actually" mean with nothing to back up their claims.
The protest nearest to me and most recent for a couple of days had "DEATH TO US MARSHALLS" tagged on the boarded up window of a nearby business. You'll excuse me for not wanting to approach people still demonstrating in the presence of messaging like that.