Trump has said some really dumb things in the past, true. My car broke down a year ago but it is fine now. But since it broke down a year ago I should never trust it, heck I should sell it right?
No, because the comparison isn't valid. Your car is an inanimate object. A part goes bad and gets replaced.
Trump, on the other hand, is a person with a history of bloviation, of all talk and little action. He has repeatedly revealed that he is a liberal and a Democrat. His views and positions are that of a liberal. See my post # 39.
He flip-flops when it's convenient, and he knows the right things to say in front of Tea Party groups that want to believe his bluster.
Still waiting for those Obama BC results, by the way...