Do the people who support the removal of Minority majority districts have any reasoning other then wanting to reduce minority representation?
It creates gerrymandering and moves away from compact and fair districts.
Minority districts can be based on compact minority populations. The Gingles test requires that there be a large enough population in a compact area in order to require the district, so there's usually no need to gerrymander the shape. Minority districts are often gerrymandered to achieve other political goals in parallel with the creation of the minority district. In VA the court struck down VA-3 precisely because of that gerrymandering and replaced it with a less gerrymandered alternative that still provided minority representation.
We are talking more about situations like IL-4 than situations like IL-1.