So the protestor destroyed Trump’s property before being punched? In that case the sign was probably seized so it couldn’t be used as a weapon.
Says who? I think you are misunderstanding the post you're responding to. Trump's goon walked through the banner the other guy was holding, then stole the banner out of his hand.
In that case the sign was probably seized so it couldn’t be used as a weapon.
Who gets to determine whether the sign could be used as a weapon? What right did Trump's good have to take the sign?