the first stereotype you mentioned is a lot more harmful, and targets minority groups or people that faced lots of oppression through history so there’s an existing power dynamic that they reinforce, whereas the classic truck driving republican is a much more represented group that has never faced historic discrimination.

Another reason is that politically, their right wing ideology is definitively also a lot more harmful to many people as the core of right wing ideology is power through oppression, and so mimicking the forms of oppression they enact on others is somewhat empowering for less represented and less powerful groups.

That’s my impression of it at least