The Republican platform was hi-jacked by Republicans in name only. Trump and many former Democrats have been reclaiming the party. Republican defeat in November will lead to the confrontation of Trump controlled MAGA, RNC versus the RINOS, and alt-right agent provocateurs.
I don't see any other way the mismatch could be fixed.
Many Republican constituents are what is referred to as the controlled opposition. They don't have internal dialogue, they are impressionable, and they are there for dramatic inflections.
Russia and partners China, Iran, & North Korea will do the upmost to stress the situation, and the controlled opposition will end up doing the adversaries bidding.
The domestic situation will have the same elements as it did in the past with race and religion becoming an outlet for the controlled oppositions nonsense.
There is no guarantee the situation will alleviate quickly. This could be a long term stress test with law enforcement being hampered.
Domestic terrorists often place there face on my boot.