I've gone from independent to registered republican voter but I still think independent so for me there is technically no opposing party and no issue thereof for me to support.
I do support large numbers of Black people leaving the democratic party and joining the republican party. The reason I joined the republican party was because I felt that as an independent (or even if I was a member of the democratic party) I couldn't do anything to stop the current "president" from being elected once he made it past the primary. Now that I'm a member of the party I can vote for a much more moderate member of the party in a primary. My vote counts a little more now.
Imo if large numbers of Black folks were rinos like myself and voted in the primary, there's no way the "president" would be re-elected. In addition we'd see those republican policies we find distasteful start to become more centrist.