Translation:

57. O ye who believe! take not for friends and protectors those who take your religion for a mockery or sport whether among those who received the Scripture before you or among those who reject faith; but fear ye Allah if ye have Faith (indeed).

Notes (Tafseer)

768. It is not right that we should be in intimate association with those to whom religion is either a subject of mockery or at best is nothing but a plaything. They may be amused, or they may have other motives for encouraging you. But your association with them will sap the earnestness of your Faith, and make you cynical and insincere.