The very first thing you post in the OP is your question, "Can the non-elect be saved?" And you answer this in the affirmative. You then go on to argue against Calvinism's specific doctrines of unconditional election and limited atonement. This is where I see the disconnect. What I think everyone here has tried to say, and you've so far dismissed all of us as dodging the question and hijacking threads, is this:
There is no such thing as a saved person who is not elect.
I think you actually agree with this statement, at least it's what I've drawn from your rather agitated responses, when you aren't reprimanding people for avoiding your questions, or threatening to report them to the authorities
So if you agree with that bolded statement, then your very opening lines of the OP don't make sense. They aren't even self-consistent with what you yourself profess to believe.
If this is about the basis of why a person is among "the elect," then that's a topic unto itself, one debated here ad nauseum. But I don't think anyone can agree with your answer to your own question. We must all say "NO. The non-elect cannot be saved."
As to Jesus' words to the crowd, how do you know--whether from a Calvinist, Arminian or any other perspective--that any of those people there were, or weren't, elect? He was preaching to a crowd of
unbelievers, which is not at all the same as a crowd of "non-elect."
Calvinism can very consistently say that in that crowd, some, all, or none could have been elect, though all were unbelievers at that moment. If anyone in that crowd later repented of their sin and came to faith, sought baptism in the Church and renounced their former unbelief, then we--Calvinists, non-Calvinists and crickets alike--would all agree that those who came to faith,
were the elect.
Those who persisted in their hardness of heart,
were not elect.
I don't see how the passage quoted in the OT is even relevant to the question you're asking.
If your real challenge here, is for Calvinists to defend their views of
unconditional election and all that goes with it, then let's keep it on
that topic.
And I'm glad to see that you don't accept Open Theism