“...he’s trying to beclown the conservatives.”
You make the assertion, which is easy to do, now explain how he is doing that. What has he said that is not true? How is what he saying diminishing conservatives, other than exposing their timidity. Even Rich Lowery at National Review, even Rich Lowery, says he is right about Mexico sending their worst.
It's not that what he said isn't true or that I disagree with his position on the contrary stopping illegals is a primary issue for me. But having an obnoxious character like Trump with his high negatives makes it a terrible idea to allow him to be the poster boy for this cause. It allows his image to project onto the cause and tarnishing it imo. And the media will just use him to further demonize the cause, conflating this obnoxious jerk with everything anti-illegals. No good will come of it in the end,