It is rational and logical to examine all candidates, and discuss their failings.
We have a civic duty to do so, regardless where that information may lead us.
In this case:
(1) In order to alert someone that they may be making a bad choice (stop Hillary).
(2) In order that the candidate you support might right the ship in time (help Trump).
While he has had moments lately where he has done better, unfortunately, Trump hasn't changed that much and his campaign staff hasn't had a lot of luck in changing him.