What do you mean 'their' religion? Israel is made up of people from all different religions, and on average people over there are much less religious than in the US.
Israel is made up of a lot of different religion - but it's about 75% Jewish. Of those, the clear majority are what I'd consider religious (i.e., attend Temple, practice religious rituals, believe in God) according to http://www.jcpa.org/dje/articles2/relinisr-consensus.htm.
I have no idea why you are comparing Israel's religiosity to Americas, since I never claimed we were any better.
