Foreign Minister Sheikh Abdullah bin Zayed Al Nahyan rebuked Netanyahu, saying Abu Dhabi denounced the Israeli leader's comments.
The US, which has played a mediation role in the talks, said it was studying the Hamas response and would discuss it with Middle East allies.
Amid diplomatic manoeuvres in the push for an end to the Israel-Palestine conflict, Middle East expert John Strawson says the crisis has reached a critical moment.
On their second day of truce talks in Cairo with Egyptian and Qatari mediators, Hamas negotiators maintained their stance that any truce agreement must end the war.