Right wing coalitions never hold together very long because they don’t have the necessary collectivist ideology

Collectivism also fails in the fullness of time because they diverge too far from the truth and get outcompeted by more liberal systems

Be careful with your definitions. Communism, Socialism, Marxism, Leninism, (i.e. leftist) are all forms of Collectivism. Neocons are a particular breed of foreign-policy ideolgos only attributed to the "right". I can't think of a "Conservative " group that advocates collectivism.

The Neocons held together for an annoyingly long time, and arguably are still around. Though admittedly, calling them "right wing" isn't quite accurate -- there were some on the right, and some that we think of anyway as more on the left. Certainly in both parties anyway. Nazis and fascists had it going for awhile too, but there was that whole skirmish in the 40's, leading to...heck Idk what point on the silly one dimensional spectrum to call the Bretton Woods/NATO order. I guess the reason I commented initially is that right wing has a lot of baggage. Individualist policy at a governance level, traditional values at home (but enforced societally, rather than legally), and non-interventionist foreign policy is certainly not representative of the larger umbrella of the right. I think you and I agree it'd be nice to see that change, and I'm actually somewhat optimistic we're slowly drifting in that direction, but it's not where we're at yet.

Fascism and Nazism are both right wing ideologies.

It's worth remembering the context of where right and left arose: the French revolution. Nobody was pushing individual liberties and free market capitalism.