An increasing number of religious groups are working for peace. Many Jewish, Christian, and Muslim organizations use a variety of tactics to lower the level of violence and bring the two sides to the negotiating table. (from http://www.ifamericansknew.org/cur_sit/rel-act-articles.html)
The USCCB provides resources for each of these four action areas:
pray for the Mother Church of Jerusalem,
go on pilgrimage to the Holy Land,
persuade political leaders to work for a just peace, and
support projects to strengthen the local Church in the Holy Land.
See HolyLand photos from the 2010 Search For Peace Art Exhibit
Searching for Peace in the Holy Land