You are right, there are many similarities between the faiths and this is because it is the same message. One God, be good and do good. And all of us are supposed to spread the message by giving the right example, the same way as a parent should give the good example to his/her children. If they see the good example, the kids will automatically follow it. The same goes for religion. But the best part of the religion is that not only is it the best example but it gives you peace and contentment.
Aisha-Taweela