didn't tell me much more, did you, Viv.
In fact, it seems as if you told me the least amount possible.
This may shock you, but I don't always have time for detailed responses and sometimes I prefer to give short answer until I understand why someone is asking it.
The only time I discuss religion outside of this forum is with my kids or when someone brings it up with me and ignores my requests to drop it (or when JWs knock on my door).
I politely explain why I find none of their reasons compelling, explain that it's not JUST Islam, but all religion and belief in the spiritual. The topics are usually up to the theists.