Dan, I personally know David Brickner, the current head of the Jews for Jesus organization nationally and Jan Moskowitz of the Chicago group (though I haven't seen either of them in 2 years). This doesn't make any sense. Are you sure it's the JFJorganization?
In the name of preserving religious freedom in America, you are failing in your patriotic duty if you have not filed a lawsuit over these events. I can get you a pro bono lawyer.
What would be the legal basis for a lawsuit?
See my "expose" post for details. In sum, what the two guys from JfJ did was tasteless and perhaps rude, but by no means illegal. Anyone may speak freely in the synagogue, whether Jewish or not.
Pelting the rabbi with questions about Jesus during his sermon is disruptive, IMO, and as a former Christian, I was embarrassed.
However, my soon-to-be fellow Jews were amazingly tolerant, and no one so much as said an unkind word to these guys. Apparently, this wasn't the first time this had happened, but no one really wanted to talk about it.
This was also over a year and a half ago, and I have since moved and am no longer a member of that shul.
In any case, there is no cause for action, just cause for comment in situations like these. :^)