[xqdrocherz]

What you are suggesting won't work. I personally find it dishonest to begin with, and besides, anyone with an internet connection can find out for himself what the shariah says about the murtad, or music, or dress codes. If the kafir asks you about these issues, what will you do? Lie to him? No offense or anything, but your idea doesn't make any sense to me.

qul in kuntum tuhibbun Allaha fa tabiuniy

Love for Allah cannot be complete without following shariah. Anyway, nobody says that you should discuss the ahkam when first giving dawah. The point of dawah is to establish iman first. Once iman is there, obedience to ahkam should follow naturally. If not, the person will be a sinner, but still Muslim. If a person thinks logically, then he won't let his distaste for the rules be a hurdle in his honest evaluation of the truth or falsity of the religion.

I wouldn't discount jihad as a means of dawah. Right now the Muslims are weak, so it won't work, but that doesn't mean it can't ever happen again.