Your ally is God, His messenger and those who acknowledge, who hold the contact prayer, and contribute towards betterment, and they are kneeling.
Translation endnotes
[5:51-57] Verse 5:57 provides the characteristics of the people of the book, whom we are instructed not to ally ourselves with. Muslims should not ally themselves with those who insult their values or promote hatred against them. Obviously, this instruction is in the context of religious conflict; not in the context of social, personal, or financial relationship. There are righteous people among the people of the book (3:113; 3:199: 5:69). Eating their food or marriage with them is permitted (5:5). Verses 5:57 and 60:7-9 are among the verses that provide us with basic principles in dealing with others.