I think where most supersessionalists get confused is they believe dispensationalists are claiming that Jews have a path to salvation that does not include faith in Jesus Christ.
What am I to think, when I hear (with my own ears, from the lips of a dispensational teacher I know slightly, associated in some way with LaHaye's pretrib group) that Jews have a different future? A different fate, into eternity?
What am I to think, when I hear some dispensationalists say, that salvation by grace alone ends at some point, replaced by salvation by works?
No gospel implications?
If someone approaches a subject with a closed mind all they process is the information that supports their predetermined view.