Hajj participation increases tolerance toward Muslims and non-Muslims alike.

Evidence

Clingingsmith’s findings were complex and wide ranging, but they told a consistent story: hajj participation led to more tolerance toward Muslims and nonMuslims alike. It increased endorsement of equality, harmony, and peace among different ethnic and religious groups. Participation also encouraged more favorable attitudes toward women and their right to education and jobs. — Norenzayan, Ara, Big gods - how religion transformed…, 538