Ideas do not exist independently of their material conditions. By shifting from an analysis of material conditions and the social relations that spring from them to one of "culture," you are placing ideas outside of their context in material reality, and moving to the realm of supernatural thinking. In other words, this is pure idealism and is anti-scientific. Idealism has more in common with fascism than it does with socialism, so I really do think you should be careful. Fascists use the "culture" argument to argue against immigration, in favor of colonialism, etc.