No, this in not clear. First you say that a Jew or Muslim cannot be saved outside of the CC but then you say that both Jews and Muslims can be saved without ever receiving communion.
Did I say that a Jew or Muslim can be saved without ever receiving communion? I don’t think I’ve ever said that. I think I said that neither could be saved outside of the Church. I guess you will have to ask yourself if one can receive communion in any other way. We believe that Baptism is required for salvation, but we also believe in Baptism by desire. If this is possible, isn’t it possible that there can be communion by desire? Here is what an apologist on this site said regarding your question:
The Eucharist unites us with Christ which is necessary for salvation. But, similar to Church teaching on Baptism, one may obtain this union with Christ by desire. A Catholic Commentary on Holy Scripture explains: “That necessity is absolute, in the sense that without the ‘thing’ or grace of the Eucharist there is no salvation, for the Eucharist signifies, effects, and perfects the unity of Christ’s mystic body, outside of which no one can be saved. Total deliberate refusal to eat the flesh of Christ would exclude from supernatural life and entail damnation. But the grace of union can be obtained by desire – personal desire, in the case of adults, and the maternal desire of the Church in the case of baptized infants.”
I know you read this passage as being merely symbolic, but wouldn’t that still require that the symbolic gesture be done by believers? It becomes fairly important to decide whether or not Jesus was being merely symbolic.
Was Jesus being symbolic? Why did he hammer the point home rather than explaining himself as he normally did when people misunderstood what he was saying?
John 6:51: I am the living bread which came down from heaven; if anyone eats of this bread, he will live forever; and the bread which I shall give for the life of the world is my flesh.
John 6:53: So Jesus said to them, “Truly, truly, I say to you, unless you eat the flesh of the Son of man and drink his blood, you have no life in you”
John 6:54: He who eats my flesh and drinks my blood has eternal life, and I will raise him up at the last day.
John 6:55: For my flesh is food indeed, and my blood is drink indeed.
John 6:56: He who eats my flesh and drinks my blood abides in me, and I in him.
So, what we know is that after saying this “many” of his disciples left him. Mere symbolism? I don’t think so.
Why did these disciples draw back? Could it be that they couldn’t reconcile what he was saying with Leviticus 17:10-14?
10 "If any man of the house of Israel or of the strangers that sojourn among them eats any blood, I will set my face against that person who eats blood, and will cut him off from among his people.
11 For the life of the flesh is in the blood; and I have given it for you upon the altar to make atonement for your souls; for it is the blood that makes atonement, by reason of the life.
12 Therefore I have said to the people of Israel, No person among you shall eat blood, neither shall any stranger who sojourns among you eat blood.
13 Any man also of the people of Israel, or of the strangers that sojourn among them, who takes in hunting any beast or bird that may be eaten shall pour out its blood and cover it with dust
14 For the life of every creature is the blood of it; therefore I have said to the people of Israel, You shall not eat the blood of any creature, for the life of every creature is its blood; whoever eats it shall be cut off."
So, is it safe to say that they believed he was speaking literally? Why not correct them? Fr Vincent Serpa, an apologist here provides this direction for interpreting Jn 6:53:
Jesus was under attack for suggesting that people could eat His flesh and drink His blood. Jews were forbidden from drinking any kind of blood and so they strongly objected. So Jesus goes so far as to state: “I tell you solemnly, if you do not eat the flesh of the Son of Man and drink His blood, you will not have life in you.” (Jn 6:53) His concern is that they understand that He is serious about what He just said. “For my flesh is real food and my blood is real drink.” (Jn 6: 55) But with regard to salvation, this has to be seen in the light of other things He also said such as believing in Him (Jn 3:36), doing the will of His Father (Mt 7:21) and being faithful to the end (Mt 24:13). ALL these are necessary for salvation insofar as one knows about them.