Shared monotheism made Christians and Moslems natural allies against Buddhists

Evidence

The next question was to decide whether to take on the Buddhists or the Moslems in the first instance. The Nestorians strongly favored an immediate attack on the Moslems; but here again they showed their dialectical simplicity. As William pointed out, the Christians and Moslems agreed on the fundamental points of the nature and existence of one God; so, as against the Buddhists, they would start as allies; but in a dispute with the Moslems the Christians would have no allies at all. — R. W. Southern, Western Views of Islam in the Middle…, 308

Categorization

  • XREF: Directly anticipates modern ‘Abrahamic religions vs. atheism’ framing — the notion of allies of convenience within theistic camps resurfaces in contemporary culture wars. — connects to: Christians and Muslims could ally against pagans over shared monotheism.