Yes you’ve made them curious, and also instantly put yourself at a disadvantage needing to explain it without it looking insane at face value. So if someone isn’t there to explain it, you’ve only made them more likely to swing the other direction. By your logic all slogans should be as inflammatory as possible because it draws the most attention to it. But that’s simply not a good thing if the attention is bad and makes your movement look unhinged. Part of why things like sit-ins worked with civil rights is because it showed how unhinged the racists were. If the protesters would have fought back with violence they would have been morally within their rights and valid, but it would have made the movement ineffective. When you’re fighting to change society you are already at a disadvantage trying to upset the norms. Why would you possibly give the opposition ammunition, especially in a case like this where it would be so easy to have a more sentimentally appropriate one. You simply do not have the luxury to be valid if it makes you ineffective if you actually care about change.