Making an unkind comment about a person's chosen and changeable hairstyle or attire may be tacky. To disparage a person's physical appearance or features, i.e., face is boorish at best. Back in the day, I remember a guy named Judge Wapner speak of the preponderance of the evidence. Trump's body of commentary tells me he doesn't much care who he offends, how he does it, and worst of all, why.