The offer was onerous. Devil is in the details, just as an example, if the conditions were that the Palestinians cannot have their own army, overseas Palestinians cannot return, Palestinians have to surrender Jerusalem etc1. Hamas rejected the 2 state solution
2. Saudi and Israel have together cohost 'israel-palestine' peace forum at UN
3. Saudi and Israel may be opened to established formal relationship, could be that hamas launched the attack to sobotage it
Hamas is against the two state solution, read this
https://www.sammyboy.com/threads/ha...-zionism-no-treacherous-christianity’.350567/
Of course the offer is rejected