(1) Substantiality Test
Violation of constitutionally valid laws is inconsistent with exemption under IRC 501(c)(3).As a matter of trust law, one of the main sources of the general law
of charity, planned activities that violate laws are not in furtherance of a charitable purpose." A trust cannot be created for a purpose which is illegal. The purpose is illegal ...if the trust tends to induce the commission of crime or if the accomplishment of the purpose is otherwise against public policy....
 
(4) Planning Illegal Acts
Not only is the actual conduct of illegal activities inconsistent with exemption, but the planning and sponsoring of such activities are also incompatible with charity and social welfare. Rev.Rul.75-384 holds that an organization formed to promote world peace that planned and sponsored protest demonstrations at which members were urged to commit acts of civil disobedience did not qualify for IRC 501(c)(3) or  (4) exemption. G.C.M.36153, dated January 31, 1975, states that because planning and sponsoring illegal acts are in themselves inconsistent with charity and social welfare it is not necessary to determine whether illegal acts were, in fact, committed in connection with the resulting demonstrations or whether such a determination can be made prior to conviction of an accused. However, it is necessary to establish that the planning and sponsorship are attributable to the organization, if exemption is to be denied or revoked on this ground.

JEWISH GROUPS CALL ON CONGRESS TO PASS RACHEL CORRIE BILL
Contact: Mitchell Plitnick 510-465-1777 (office) 510-484-6472 (cell) FOR IMMEDIATE RELEASE

San Francisco, April 2, 2003 - Several grassroots Jewish peace organizations today urged Members of Congress to support the Rachel Corrie Resolution (H.Con.Res. 111). ...Participating organizations include Jewish Mobilization for a Just Peace and Bubbes and Zaydes for Middle East Peace (Philadelphia), A Jewish Voice for Peace (San Francisco), Jewish Voices Against the Occupation (Seattle), Jews Against the Occupation (New York), Jews for Peace in Palestine and Israel (Washington, DC), Not in My Name (Chicago), the Tikkun Community, and Visions of Peace with Justice in Israel/Palestine and Jewish Women for Justice in Israel/Palestine (Boston).

Here is what JVFP told the IRS in 2002

Here is what JVFP actually did in 2002
http://www.jewishvoiceforpeace.org/content.jsp?content_KEY=226

September 24, 2002
A Jewish Voice For Peace calls-
Representative Pelosi:
No U.S. Weapon$ For Israel's Occupation

"Please call or fax Congresswoman Pelosi's office today, tomorrow... and keep on calling! We need to build on our momentum to let Rep. Pelosi know that many, many people are demanding that there be no U.S. military aid for Israel's Occupation. And, furthermore, that we want her to call for an investigation of whether the July 23rd bombing of an apartment complex in Gaza violated the Arms Export Control Act. You can also mention that you have serious concerns that House Resolution 5410 (the Foreign Operations Apropriations Bill) would give Israel $2.1 billion in military assistance without ensuring that Israel stops violating Palestinian human rights. (The bill would give an additional $600 million in economic assistance and $200 million in "antiterrorism assistance" to Israel -- but a paltry $50 million in humanitarian assistance for Palestinians in the West Bank and Gaza.)"

Update: JVFP 2005 Tax Return
We could not find the Schedule A on the 2004 return but this one seems to indicate that JVFP reported no lobbying activities in 2004 either.

Let's compare what JVFP told the IRS to what it actually did in 2005:

http://www.jewishvoiceforpeace.org/publish/article_11.shtml

On August 15, about 50 members and supporters gathered in front of Nancy Pelosi's office to demand that Congress push for the removal of all settlements.

Letter from the Directors
We’ve grown from an all-volunteer organization to a globally-recognized one, with
chapters already in Washington, DC, San Jose, Sacramento, and the San Francisco Bay
area, and more on the way. We are able to make a footprint much larger than our means
because we think and act strategically – we’re careful when we need to be, and we’re not
afraid to take risks when we need to.
JVP is a trusted source for media, and we’re becoming more influential. Thanks to our
supporters, we are fast becoming a force that our congressional representatives need to
reckon with. Leaders of groups that give Israel their blind support are working hard against
us specifically because we not only shatter their myth of representing all Jews – we show
they don’t even represent a majority.
If you’ve been a JVP supporter, we hope you’ll remember how you’ve contributed to
building this organization as you read on. If not, we hope the coming pages move you to
jump in and join us.
Warm regards.
...
Directors of JVP