Have there been cases where the right-wing coalition fractured and destroyed itself?

[Hardkill]

Leo, in your post about how right-wing media dominates social media, you argued that the left often turns into a circular firing squad, whereas the right is usually much better at rallying around one leader, one message, or one coalition.

That got me wondering: have there been important examples where the right-wing coalition did fracture badly enough to cannibalize itself?

I do not just mean ordinary disagreements or factional tensions. I mean situations where the right became so divided internally that it seriously weakened its own political power, media ecosystem, electoral performance, or ability to govern.

A few possible examples that came to mind:

• 1912 Republicans splitting between Taft and Roosevelt
• Hitler turned Fascist Italy into a German-controlled puppet zone after Italy broke with Germany in 1943
• The far-right ruling bloc turning on itself during the Nazi regime’s end
• 1976 Republicans with the Ford vs. Reagan divide
• 1992 with Bush weakened on the right and Perot disrupting the broader anti-Democratic coalition
• Tea Party vs. GOP establishment in the 2010s
• Somewhat in 2020
• What's going on now between the anti-war and pro-war MAGA Republicans

Never Trump conservatives vs. MAGA, although MAGA seems to have mostly won that fight

So my question is:

What are the best examples, historically or internationally, of the right actually behaving like a circular firing squad?
And in those cases, what caused the fracture?

Was it usually:

• class/economic divisions?
• establishment vs. populist conflict?
• personality/ego clashes?
• foreign policy splits?
• religious vs. secular tensions?
• regional divides?
• media ecosystem fragmentation?

I am also curious whether people here think the right is inherently more coalition-disciplined than the left, or whether it only looks that way during certain periods because it has stronger hierarchy, clearer enemies, and a greater willingness to suppress internal dissent.

Would be interested in both US examples and examples from other countries.