Fifteen AMs — a quarter of the Assembly — fired questions at the envoy, who mounted a combative defence of Israel’s position.
AMs condemned Israel’s stance on the West Bank settlements, their “stranglehold” on the Gaza Strip, strikes against Lebanon and the treatment of Arab citizens in Israel.
Protesters outside the Assembly on Tuesday while the Israeli ambassador spoke inside
Mr Prosor was in Cardiff on the latest leg of his round-Britain quest to explain the case for Israel and its dealings with the Arab world.
He had been invited to the Assembly by the only Muslim member, Plaid Cymru’s Mohammad Asghar, to meet AMs during his two-day visit to the Welsh capital.
Tory leader Nick Bourne, who could not attend the meeting, praised Mr Asghar for his “act of political courage” in arranging it.
Members from all four parties — Plaid Cymru, Conservative, Labour and Liberal Democrats — turned up despite a boycott call by Assembly presiding officer, Lord Dafydd Elis-Thomas. He had emailed AMs urging them to snub the meeting .
Mr Prosor described Lord Elis-Thomas’s boycott as “against the Welsh spirit” , saying: “Although a lord, his statements are not very noble.”
After the meeting, Lib Dem AM Peter Black said: “We asked difficult, robust questions about the illegal settlements in the West Bank, the stranglehold on Gaza and treatment of Arab citizens.”
Plaid Cymru AM Alun Ffred Jones told Mr Prosor that the West Bank situation was creating a “very poor and negative” impression of Israel. Mr Jones scoffed at his response that the settlements were part of a “natural growth”. He said: “He was very robust in defence of Israel and came across as combative and challenging. But it came over very, very strongly from him that Israel has adopted a siege mentality.”
AMs were also critical of Israel’s 2006 war with Lebanon, which they claimed allowed Hizbollah to flourish. But Mr Prosor said Israel had to respond when its soldiers were kidnapped.
Mr Asghar said: “It was a very constructive meeting. The questioning was very aggressive and robust but the ambassador was informative and gave as good as he got.”
On Monday, Mr Prosor spent time with the Jewish community, speaking to 200 people at an event arranged by Cardiff Reform and United Synagogues.
The guests, members of both Cardiff synagogues, Newport and Swansea congregations and Christian supporters of Israel, were welcomed by Philip Kaye of the Cardiff Reform Synagogue.