AFAIK all religions have the Golden Rule, or some variant on 'treat others the way you would wish to be treated'. But AFAIK only Christianity values meekness so emphatically. Turning the other cheek, being rewarded for passivity, kindness being demonstrated by putting others first at any cost to yourself.
Christianity has shaped modern western society, even if society is no longer overly Christian. Could this subconscious valuing of meekness be one of the reasons transgenderism has had such success colonising western society?