They were ejected because they submitted some seriously broken patches, which triggered kind of a panic re-review of their previous patches, which concluded that they had been careless the whole time (Chesterton's Fence type stuff).
I keep hating this but nobody has ever linked to the supposed broken packages. With how political RedHat is I would not be surprised one bit if it was completely overblown and exaggerated just so they could use it as an excuse to kick out someone who's politics they didn't like. Same thing has happened multiple times in the last few years (Hyprland is just one notable example)
The political stuff is just an extra bonus.