Islam’s cultural contributions can be listed inside the “o” in those quote marks.
Is that a net/net zero or an absolute zero? You must be using hyperbole. Islamic scholars do deserve some credit for preserving and transferring classical knowledge and innovation. Ibn Battuta’s travels have historical value, no? Or are you arguing that “Islamic” scholarship occurred outside of and in contravention to Islam (Islamic Law per the imams)? That is that this scholarship occurred despite Islam not because of it. This being in contrast to Christianity.