Destroying an icon of extreme wealth and marking it with a traditional American motto isn't counter-productive. It's a substantial blow against Trump and what he stands for, sending the message that many Americans are willing to fight back against the repressions of his government. You are free to take issue with destruction of property, but these actions are not meaningless.
So burning a muslim immigrant's car(while simultaneously nearly killing him) who did not support Donald Trump's limo is an image people will rally around? Are you joking?