Complex sentence: This asymmetry in right led to the criticism of the license by many members of the open source and free software movements, most notably Richard Stallman; furthermore, this provision, as well as the patent licensing provisions, make the license GPL-incompatible.
Split into simpler sentences: This asymmetry in right led to the criticism of the license by many members of the open source and free software movements, most notably Richard Stallman. This provision, and also the patent licensing provisions, make the license GPL-incompatible.