Take them to John 6:48-56
48 “I am the bread of life. 49 Y OUR forefathers ate the manna in the wilderness and yet died. 50 This is the bread that comes down from heaven, so that anyone may eat of it and not die. 51 I am the living bread that came down from heaven; if anyone eats of this bread he will live forever; and, for a fact, the bread that I shall give is my flesh in behalf of the life of the world.” 52 Therefore the Jews began contending with one another, saying: “How can this man give us his flesh to eat?” 53 Accordingly Jesus said to them: “Most truly I say to YOU , Unless YOU eat the flesh of the Son of man and drink his blood, YOU have no life in yourselves. 54 He that feeds on my flesh and drinks my blood has everlasting life, and I shall resurrect him at the last day; 55 for my flesh is true food, and my blood is true drink. 56 He that feeds on my flesh and drinks my blood remains in union with me, and I in union with him.
Ask them to explain, ALL of Isreal ate of the bread, the priestly tribe as well as all of them, ask them how can a person get everlasting life without partaking of Christ blood and flesh? Do not allow them to pull the only for the little flock covenant, See what they say, and tell them that you are confronted with believing them (only Men) or Christ? HMMMM
abr