So, we are at war with a growing, fascist, extremely ruthless and hyper-radical Islamic enemy who has carried out terrorist attacks on America here at home and abroad... and, some idiots out there would be OK with electing some theoretical Muslim POTUS... hhhmmmmmmmmm... ooooooooookay. Many Muslims believe in implementing religious-based Sharia law both locally, state-wide, and nationally - as do our avowed Islamo-fascist enemies ISIS and AQ. Wouldn't such a goal be antithetical to the US Constitution?
Let me put it slightly differently. What if the GOP nominated a Nazi to run against FDR in 1944? Would FDR have been wrong to suggest Americans should not elect a Nazi as POTUS? I guarantee DEMs would be defending FDR in such circumstances...