Can we greet non-Muslims with conventional Muslim greetings "assalam-o-alaikum"?
What is the stance of Sharia and Hadīth or Sunnah on family planning?
Can we teach non-Muslim to say "inshaAllah". Because, I have habit of saying this and my non-Muslims friend usually ask me what is this. I want to know should I encourage them to do the same.
There is nothing wrong in saying assalaam o alaykum to the non-Muslims. Some people think that we can wish well for the non-Muslims but that is not true Islamic stance. We need to interact with them and try to do them good. We need to create a da'wah relationship with them so that we can easily communicate to them the teachings of our religion.
For our view on the issue of family planning please refer to: http://www.monthly-renaissance.com/issue/query.aspx?id=341
There is nothing wrong with saying inshaAllah before the non-Muslim friends and teaching them what it means.