The real sign that a person truly believes in Hashem and is firm in his beliefs is if he is put into the world and remains a Torah true Jew.
Furthermore, every real soldier knows that the enemies of Jews are the 70 million non Jews who openly proclaim their intention to wipe Israel and Jews off of the globe. Their entire service is dedicated to hatzolas nefoshos-which overides ALL other mitzvos. Does anyone really believe that if Israel had no army doing its job 24/7 that we could rely solely on our zechusim to have Eretz Yisroel? Hashem needs us to have hishtadlus to protect ourselves. The Charedim are benefiting greatly from the service the army provides, and all they do is vilify the army. ( There are a few charedim who go into the army as rabbis, and are mashgichim in kitchens, and provide counseling and lead tefilla.) I think that a great idea would be if a Charedi gadol would openly and publicly write a letter thanking the Israeli government/army for ensuring that the country is safe and for being so gracious as to allow their population to learn Torah. And make hakarot hatov an agenda. It will be mekarev the secular and maybe they will begin to want to learn something about their heritage.