OC - two points.
Non-Jews who are tourists, do not have to serve in the Israeli army. They are tourists. EDIT: I don't know if it's true now, but I had a friend who visited Israel in the 80s, and he was an Orthodox Jew who had a visa to stay, I think it was 2 years. As soon as he arrived and was through Customs, he was conscripted! Within 2 weeks, he was shot by a tracer bullet, hospitalized, and returned to Canada. SO, yeah, if you are Jewish, that may be a possibility.
The paper you quoted has some really awesome stuff, but it is about 1st Amendment rights - ie, people serving in the US, "where the need is greater" TM , not missionairies who were/are sent abroad from the USA. We do not want to be like the WTS and quote things 'out of context' in order to make a point.
tal