Despite their claims to the contrary, MAGA and tankies are closely related, in the same way that the most dedicated Nazis in East Germany often became the most dedicated Stalinists.
Both are utterly uninterested in serious discussions of policy; identity is what matters to them. Racial identity to MAGA, class identity to tankies, but both share disinterest in data or results, relying on what is 'intuitive' to their axioms. Ultimately, this is why any minority support from tankies is only 'skin-deep'; it only matters to them insofar as it supports or refutes their class-based axioms.