Short answer: As of July 2026, yes, with nuance. Jason Alexander (born Jay Scott Greenspan), best known for playing George Costanza on "Seinfeld," is Jewish and publicly identifies as a supporter of Israel, but his public record is that of a moderate, dialogue-first advocate rather than a hardline partisan. He has taken concrete pro-Israel actions, most notably speaking up in November 2023 for a nine-year-old boy held hostage by Hamas, and hosting a Jewish-community antisemitism fundraiser for the Biden campaign in 2020. Since at least 2011 he has also served on the entertainment council of OneVoice, a group promoting Israeli-Palestinian dialogue and a two-state solution, a stance that has drawn criticism from some pro-Palestinian commentators as too "even-handed." No boycott participation or refusal, and no specific donation figures, were found in the public record.
What Jason Alexander has actually said and done
- October 24, 2011: Alexander joined a OneVoice Movement delegation trip to Israel, meeting with Israeli President Shimon Peres in Jerusalem, visiting the rocket-affected southern city of Sderot, meeting Palestinian delegation leader Jibril Rajoub, and taking part in a Knesset discussion on the two-state solution. He urged that moderate voices "must be more determined than the extremist voices," according to the Jewish Telegraphic Agency, with the trip also covered independently by Ynetnews.
- November 2011: Pro-Palestinian commentator Larry Derfner, writing for Mondoweiss, criticized Alexander's "even-handed" framing of the conflict as a "liberal failure," arguing he was avoiding clearly faulting Israeli government policy. This shows Alexander was viewed by that camp as a moderate, not a one-sided Israel booster.
- August 3, 2020: Alexander moderated a Biden presidential campaign videoconference fundraiser focused on combating antisemitism, featuring Sen. Jacky Rosen (D-NV) and Rep. Adam Schiff (D-CA), part of the campaign's outreach to Jewish donors, according to The Times of Israel.
- November 18, 2023: Forty-four days after the October 7 Hamas attack, Alexander joined a celebrity #BringThemHome campaign, posting a photo of nine-year-old Hamas hostage Ohad Munder-Zichri with the words, "Today, I will be his voice... On behalf of Ohad, I am asking, please, please set him free now," as reported by JNS (Jewish News Syndicate).
- September 30, 2024: On the Being Jewish podcast, Alexander was described in the episode notes as "a proud Jew and activist supporting Israel," discussing his "complex relationship with Israel," his longtime OneVoice and PeaceWorks peace-activism work, and the emotional weight of being Jewish since October 7.
A decade of Jewish identity meeting Israel advocacy
Alexander's public engagement with Israel spans well over a decade and is consistent in character. He sat on the entertainment council of OneVoice, an organization promoting moderate voices and a negotiated two-state solution rather than backing either side exclusively, for roughly ten years as of 2011. That trip put him in the same room as Israeli President Shimon Peres and Palestinian official Jibril Rajoub, a dialogue-first posture that drew criticism from at least one pro-Palestinian commentator who felt Alexander was too even-handed. At the same time, his Jewish communal engagement has been real and documented: he hosted a 2020 Biden campaign fundraiser specifically on combating antisemitism alongside two Jewish members of Congress, and after October 7, 2023, he used his public platform to personally advocate, by name, for the release of a child hostage as part of the international #BringThemHome campaign. By 2024, he was explicitly describing himself as "a proud Jew and activist supporting Israel" while still calling the relationship "complex." No evidence was found of Alexander participating in or refusing any boycott, and no verified donation amounts or named charitable organizations could be confirmed with a primary source. No public record was found placing new statements or actions in 2025 or the first half of 2026; the most recent confirmed activity remains the 2024 podcast interview.
The bottom line
Jason Alexander is Jewish and a genuine, longtime supporter of Israel who combines that identity with active advocacy for Israeli-Palestinian dialogue and peace rather than hardline partisanship. His concrete, sourced actions, the 2011 OneVoice trip and meeting with Peres, the 2020 antisemitism fundraiser, the 2023 hostage advocacy, and the 2024 interview describing himself as "a proud Jew... supporting Israel," collectively support a "yes, he supports Israel" answer, while confirming he has never postured as a one-sided or maximalist pro-Israel figure. That moderation is precisely why some pro-Palestinian voices have criticized him as too even-handed.
Wear your own answer
Whether your own support for Israel leans quietly steady or proudly out loud, you can carry it the same way many American Jews and allies do: visibly. Shop Israel's I Stand With Israel collection includes pieces like the I Stand With Israel bracelet, a simple, everyday way to answer the question in this article's title for yourself, no complicated politics required, just a clear statement of where you stand.
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Last updated July 2026. We update these profiles as the record changes.
