Obviously, the scriptural arguments here are complex. However, and with clear disclosure that I do not believe in predestination, I want to raise the uncomfortable possibility that a deeply unhealthy, tribalistic, quality, that is perhaps baked into our DNA, may undergird the attraction of some people to this doctrine.
History, as well as the current world landscape, suggests that human belngs like to see themselves as a part of a privileged group. It is the old "good us" vs "bad them" way of thinking. To the extent that we have this unhealthy way of looking at the world, we are, naturally enough, drawn to a doctrine such as predestination that puts "us" in the saved group and "them" in the "condemned" group.
Now, of course, defenders of predestination will fall all over themselves to claim that they do not "deserve" to be in the group of those elected to salvation. And, of course, they have some supporting Biblical texts. But, it is really hard to make sense of the notion that God "elects" some with seemingly no intelligible grounds - just "according to His will". I politely suggest that we can make no sense of such a position and, to be frank, we have to believe, although we deny it, that there is something about us that merits our election, just as there is something about the condemned that merits their condemnation.
It all seems extremely suspicious.
