Then there are those things which I don't think are very well thought out. They oppose the use of a Constitutional Convention but that's probably the only way a law forcing politicians to abide by all the laws that they create would ever pass. They affirm the right to own property without governmental interference and yet that would prevent the building of the "Border Wall" along the Mexican border.
They support the display of The Ten Commandments and "other religious symbols" on public land and yet that would allow a Koran, or quotes from it, to be openly displayed in government buildings. (Not that there's anything wrong with that.) They support having absolutely no restrictions on the ownership of any kind of gun and yet that would allow convicted felons, the mentally insane, and would-be terrorists to obtain guns legally and openly.
They would require prison inmates to perform meaningful work and yet, isn't that slavery? They support the embargo against Cuba until democracy is restored and yet China, our biggest trading partner, is the worst human rights violator in the world. They support the dissolution of the Federal Reserve and yet no large, modern economy can function without a central bank. They support elimination of day labor work centers and yet isn't that how many construction workers find work?
Some of the planks support policies which have been shown to be ineffective or just plain wrong. Making abortion or drug use illegal doesn't stop it. It only creates a black market for it so that criminals can thrive. Then some otherwise ordinary citizens become criminals and we spend a lot of time and money building and filling prisons. Education and treatment programs are much more effective than prohibition.
Republicans "oppose any sex education other than abstinence until heterosexual marriage." Statistics show that this only causes higher teen pregnancy rates and then a myriad of issues for the people involved who then have to turn to government assistance, sometimes for the rest of their lives.