Bar said the right-wing groups in Israel undermined the chance for peace and pushed for a binational state, which he said would be disastrous for the future of Israel.
Spokesman Abu Rudeineh confirmed that Abbas condemned violence from any party and was committed to a peaceful settlement and continuation of talks at least until April 29, as agreed to with U.S. Secretary of State John. F. Kerry.
He said a three-way meeting including the U.S. that was supposed to have taken place in Jerusalem on Wednesday had been postponed until Thursday evening to allow special U.S. envoy Martin Indyk time to return from a trip the U.S.
The Palestinians and Israelis have been holding intensive talks in the last two weeks to avert a breakdown in the negotiations.