they were forced out of the party during the '90s

You need to keep in mind that the modern republican party is not an honorable representative parliamentary party, intent on bargaining for the interests of a constituency.

The republican party is an ideologically coherent totalitarian vanguard party built on a Leninist/Fascist model.

It does not represent constituent interests in a representative democracy that requires compromise and bargaining.

It's sole goal is to seize power, obliterate any opposition, and rule unopposed

Remember the statement of Phil Gramm, that he looked forward to the day when Democrats in Texas would be hunted with dogs?

Well, there are (and have been) countries where members of the opposition party WERE hunted with dogs.