October 7 was calculated to derail the peace negotiations between Israel and Saudi Arabia, and in the short-to-medium term it succeeded. But, I expect that (privately) MbS is really angry at Hamas for doing that, and I think most other Arab governments likely feel similarly. That doesn’t bode well for Hamas in the long-run.
It also shows, of course, that Arab countries have not changed and have zero interest or respect for the ICC or the UN. But they do seem to respect that Iran wants to destroy them. And if stopping Iran requires war in Gaza, then they're perfectly ok with that. They have barely denounced Israel over it, in fact most haven't done that at all.