This would be a blatant first amendment violation, along with a violation of several other rights centered around non-discrimination.
The GOP really don’t give a flying shit any more about the Constitution, do they?
Apparently, “censoring conservative viewpoints” (known to normal people as "not being racist and bigoted) is bad, but literally trying to express liberal viewpoints is somehow “indoctrination” and should be a criminal offense. Yeah, I know. They wear the hypocrisy as a badge of honor and campaign on it.