I'm going to respond to this post because it's full of misinformation about what it is Calvinists believe, and what it is that Calvinists believe seems to be part of what the opening poster is looking for.
Calvinists DO deny Christ is the Savior of the world or of all men. They believe Christ is the Savior of ONLY the elect.
Calvinists believe Christ only actually saves the elect (or believers), and that the saving purpose of his death was toward the elect (or believers). Christ did not die intending to save every single person who ever lived; he died intending to save everyone who believed.
However, they also believe that Christ provided a means of salvation for mankind, and on the basis of this means of salvation, the gospel can be shared with everyone, for there is a way for anyone who believes to be saved.
.... they believe Christ is NOT the potential Savior of all men.
It depends on what you mean by
potential. If what you mean by "potential Savior" is that there is a way provided for any person who believes to be saved, then there is potential for all men in Christ's death. And quite honestly, I don't know what else besides that you think it can mean.
Ask them if Christ died so that ALL MEN could be saved? There answer will be no.
I don't have to ask "them". I can ask myself, since I am one. And you are right, I would say "No, Christ didn't die so that every single person could be saved. He died so that EVERYONE WHO BELIEVES will be saved. Christ did not die with the purpose of saving unbelievers.
Ask them if Christ tasted death for every man? Heb 2:9 They will say no.
No Calvinist disagrees with Hebrews 2:9. They might have a different interpretation of it than you do, but they wouldn't disagree with it. Every single Calvinist would believe that there is some sense in which Christ came to "taste death for everyone."
Calvinist teaches a false gospel. They cite the scriptures that Christ died for the church, his sheep and for his people, but twist or ignore the same bible that says Christ was given FOR THE WORLD, the whole world, the Savior of all men and the Lamb of God which takes away the sins of the world.
Uhm....as explained above, a Calvinist just thinks that the Scriptures that say that Christ died for the church mean that his death had special reference to them. It had a purpose for "everyone who believes" that it didn't have for "everyone who doesn't believe".
Also a Calvinist cannot share the true gospel with any unsaved person and tell them Christ died FOR YOU.
I would tell someone Christ died for them, and so would many Calvinists I know, since, as explained above, I think that one of the purposes of Christ's death was to provide a means by which human beings could be saved and upon which the gospel can be shared throughout the world.
I don't know where you are getting your info about Calvinism, but your source is not a good one. It misrepresents things, and is full of straw men.