I’m from Sweden and I’m usually rather confused about how the US right wing works. Does it really exist a significant amount of christian randians? People who somehow enjoy both her and Lewis views of the world?

I would say that Rands thinking is even more antithetical i relation to traditional christian morality that to marxism. Marxists generally preaches collective action for collective benefit while traditional christianity preaches modesty and self sacrifice, something that Rand totally hated.