They actually haven't. Most of the Muslim scholarship has been lost since the sacking of the Mutazilite rationalists, crusades, Spanish inquisition, and colonization. Most of them are a product of Islamic education and contextualization which every Muslim can do. We have more knowledge on our fingerprints than a Bedouin self appointed scholar in a village of Basra. If you are however right, you can assume Christianity is right because most of the worlds scholars in this century that follow a religion prescribe to Christianity.
We have the Holy Quran and the Sunnah of Prophet Muhammad (scw) clearly documented. The reasoning of different Muslim jurists in the main 4 Islamic of Thought were clearly preserved. Crusades and Mongols only destroyed Baghdad and Jerusalem, But Islamic learning centers in Damascus, Cairo, and in other places were always intact. No Muslim scholarship have been lost, and no amount of crap that revisionists like you throw around will ever change that fact. Besides, Islam is conveyed through the mind and efforts of Muslims. And kuffars will never be able to take that away from us.
But to understand where you're coming from, are you an ex-Muslim, a follower of sect that is outside of Islam, or someone with a lifestyle that is not compatible with Islam? I've asked because the people who run with what you're stating fall in at least of these categories. Just to let you know your futile efforts and those of others like you will never be able to change the over 1400 years of Islamic scholarship.