Most people can see through a disingenuous person's argument.
But, many are also swayed by that person's rhetoric.
The author lacks integrity if the Means of the argument require ignoring the intent of the Ends. In this case, arguing that the Constitutional support of Roe v Wade is baseless (the Means) so that you can ensure the "life" and "soul" is protected (the Ends).
I'll maintain that ignoring the integrity of the Means in order to achieve the Ends is a fundamental evil.