You still impugn them with your words. I understand your overall meaning that have to go out among the people and speak in language they understand. However, if you want converts, YOU DON'T WEAKEN YOUR POSITION BY TAKING THEIRS. Neither Jesus nor Paul ever compromised the message for converts... they either accepted or didn't. That lesson applies very well to our modern GOP.
No but if the best you can get is someone who denies you 3 times, you work with that.