I share your hope for a return to sanity on the right.
An ideologically ridiculous, reactionary, violent, and unAmerican right wing is bad for everyone -- those on the right and equally those on the left.
The left in the absence of a sane opposition will eventually become radicalized beyond anything we see today. In combination with the right, the two wings will then set to tearing the country apart while neither wing will really address the issues and problems facing average Americans. No one will be left representing the center, which will then provide an opportunity for wannabe tyrants to rise to power through the middle by falsely cloaking themselves in "moderation".
None of this is far-fetched. Such is what has happened before in history. e.g. The rise of fascism in Italy circa 1920s. Several of the world's military coups at various times and places, etc.