I don't think anything can crack a die hard MAGA repub. But different strategies can work on different subsets of on-the-fence repubs who might just be semi-bubbled, but not totally insulated.
Frankly, not everyone has a problem with fascism, and you can't necessarily make them, either. Let's not kid ourselves. An economic argument provided with evidence of corrupt behavior might convince some, and would be well worth trying in certain situations.