I feel your pain, but the Senate Republican Campaign Committee and the RNC exist for only one reason: to elect Republicans, and they don't care what those Republicans stand for...just as long as they get elected. It's baldfaced pragmatism, intended to keep their majority. Don't expect ideological purity from the SRCC or the RNC.
Amen! Ideological "purity" has a place in theology, but not in politics. The name of the game is getting a Republican majority, then working to get the best conservative Republicans into leadership positions.