(JTA) – British Labour Party leader Jeremy Corbyn met with the leader-in-exile of a Palestinian terror group in 2014 weeks before its members carried out an attack on a Jerusalem synagogue in which six people were killed. In November 2014, two Palestinian assailants armed with a gun, axes and knives entered the Bnei Torah Kehillat Yaakov synagogue in Jerusalem’s Har Nof neighborhood and began killing indiscriminately. Six people were killed.

The Times of Israel published a picture of Corbyn standing next to Maher al Taher of the Popular Front for the Liberation of Palestine at a 2014 commemoration ceremony for the Black September terrorists who took part in the 1972 massacre of 11 Israelis at the Munich Olympics. Corbyn’s participation in that event, in which he was photographed laying a wreath near the terrorists’ grave, has provoked fierce reactions from British Jews and Israeli politicians. Corbyn has attempted to downplay his involvement in the wreath-laying ceremony, telling Sky News that “I was present when [the wreath] was laid. I don’t think I was actually involved in it.”

Footage from 2015 shows Jeremy Corbyn endorsing the Boycott, Divestment and Sanctions movement against Israel as “part and parcel of a legal process that has to be adopted.” Corbyn has maintained that he opposes a blanket boycott of Israel, supporting instead only boycotting produce from Israeli settlements. “Jeremy is not in favor of a comprehensive or blanket boycott,” a spokesperson for Corbyn told The Guardian in December. “He doesn’t support BDS. He does support targeted action aimed at illegal settlements and occupied territories.”

In the footage filmed in Belfast, he is asked: “Can the panel give hope to the people of Palestine by supporting the movement for Boycott Divestment and Sanctions against Israel?” He replies: “I think the boycott campaign, divestment campaign, is part and parcel of a legal process that has to be adopted.” He later adds: “I believe that sanctions against Israel, because of its breach of the trade agreement, are the appropriate way of promoting [the] peace process.”

These revelations follow intense scrutiny of Corbyn’s past and present statements about Israel and his failure to curb resurgent antisemitism within his party. Last month, Labour pointedly decided not to adopt parts of the International Holocaust Remembrance Alliance’s working definition of antisemitism that related to Israel. Corbyn is widely accused of tolerating or ignoring antisemitism disguised as anti-Israel speech, among other forms of Jew hatred.