Feldman is respected by some people for his work as leading advocate for justice. He has appeared before the bench in many of the significant petitions presented to the Israeli High Court of Justice (Bagatz) regarding the settlements. He has also represented Mordechai Vanunu and the family of Tom Hurndall.
Feldman is the founder of the Association for Civil Rights in Israel (ACRI) as well as a founding member of the "The Israeli Information Center for Human Rights in the Occupied Territories (B'Tselem)".
Among his other cases, he acted as the advocate in a joint petition to the Israeli High Court of Justice by Director Mohammed Bakri and Indymedia Israel over the censorship of Bakri's film "Jenin, Jenin".
The Mordechai Vanunu case is the case of a former Israeli nuclear technical assistant who revealed details of Israel's nuclear weapons program to the British press in 1986. He was subsequently lured to Italy and kidnapped by Israeli intelligence operatives. He was transported to Israel and ultimately convicted of treason and espionage. According to a Norwegian lawyers' support group, Vanunu was a political prisoner, denied democratic freedom of speech. Vanunu was released from prison in 2004 after spending 18 years in prison, including more than 11 years in solitary confinement.
The Tom Hurndall family case is the case of a 23-year-old British photography student, a volunteer for the International Solidarity Movement (ISM) and an activist against the Israeli occupation of the Palestinian territories. Hurndall was shot in the head on April 11, 2003 by an Israel Defense Forces (IDF) sniper, Taysir Hayb, while they were both in the Gaza Strip. Hurndall was left in a coma and died nine months later. On June 27, 2005, Hayb was convicted of manslaughter, obstruction of justice, giving false testimony and was sentenced to 11 and a half years.
In 1991 Feldman received the Robert F. Kennedy Human Rights Award. An annual award given to an individual whose courageous activism is at the heart of the human rights movement and in the spirit of Robert F. Kennedy's vision and legacy.
- "The fighting in Gaza was too reminiscent of Bosnia. People there were tried for shooting at civilians, schools and UN facilities after that, so the concerns are justified."
- "Every Israeli involved in the Gaza campaign is subject to prosecution anywhere in the world. There is no immunity in cases of war crimes."
- "Attorney Avigdor Feldman on refusal to serve the occupation". Mailman.lbo-talk.org. Retrieved June 5, 2010.
- "Palestine: Information with Provenance (PIWP database)". Cosmos.ucc.ie. Retrieved June 5, 2010.
- "Filmmaker Mohammad Bakri Screens His Latest Film in New York. Washington Report on Middle East Affairs, September 2007 by Jane Adas. Last Accessed on: August 4, 2009". Britannica.com. October 28, 2002. Retrieved June 5, 2010.
- Robert F. Kennedy Human Rights Award. Avigdor Feldman. Archived April 7, 2014, at the Wayback Machine.
- Experts: Concerns over Gaza op prosecutions justified