Christ's own words about being saved do NOT mention communion (which, in fact, was used for remembrance and reflection, not a requirement to be saved). Salvation comes from faith the profession of faith by baptism; those are the words of Jesus. The mass celebrant himself says the words "take, eat this is my body which was shed for you. Do this in remembrance of me".
Communion will not save you; attending mass will not save you. Confession will not save you. It is by faith and faith alone that we receive the Grace of God. We ask for forgiveness in the name of Jesus and he will intercede on our behalf. THOSE are His words.
FWIW, I was raised Methodist on the weekends, Catholic during the week (K-12 in Catholic schools), married a Catholic girl (she's now a Methodist), and my mother-in-law is the Catholic education director for a local parish, as well as the RCIA director. My grandmother-in-law has made probably close to 10,000 rosaries over the years for each of the 4th grade students at the parish school as they go through confirmation.
I know the Catholic mass forwards and backwards, as well as the theology behind Catholicism. And I know the theology of Protestantism. And I read the Bible.
Suffice it to say, Catholics do a GRAVE disservice to Christianity, the words of Jesus, and themselves when they insist the Catholic church and its rites are the only way to salvation. It is NOT by works that we are saved - THAT is the teaching and words of Christ.
If you insist your doctrine is the only "correct" way to worship, then you have done exactly what Jesus commanded us to not do - you have put process and procedure ahead of relationship, and are no better than the Pharisees of His time.
So you agree with the claim:
“I think all are saved, even you. It matters not to me what you believe, God will welcome you.”?
If you know so much about Catholicism, you would know that we do not claim that works alone will get you saved. Nor do we say the only way to salvation is through the Catholic Church.
Of course, many Catholics would think the above, but they would be incorrect.