Soel404 said:
How is spining a Galaxy Solar-System level but spining a planet is Dwarf Star level?
It's not. Unless you mean busting a planet at extremely high relativistic speeds still below the cutoff point.
Also, overpowering an object's rotational KE <<<< destroying said object, in most cases. This is of course unless a calc puts it higher via some extreme KE values, which we can't do in this case, because the object is being spun at FTL speeds, thus we can only use the minimum requirements for overpowering a galaxy's rke, which is ~1 gigaFoe.