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Why don't you first start by admitting that Islam is a supremacist ideology? And stop playing this "we are the victim" game.
Is it wrong to own slaves? Is it wrong to stone adulterers? Is it wrong to kill homosexuals, Jews, atheists?
Was Allah wrong when he recommended these punishments?
I think you have quite a bit of work to do BEFORE you start looking OUTSIDE of your own political system aka Islam.
Hint: You can start by saying that Allah did not really mean it, and gave those laws only to people in the 6th century.
There have been numerous Muslim apologists do this, by noting such things as "such and such an order in the Quran to kill infidels" applied only to a particular issue or battle during the life of their Prophet.
Regardless, I do prefer the Christian montage, "Let him who is without sin cast the first stone."
It would be easier to reform this system in the age of ignorance. You would just say that the angels came to the Caliph and told him to amend the Quran and everyone would accept it.
Today, we have cameras, audio, and infrared recording equipment so no one would believe such claims. So moderate Muslims are in a bit of pickle. On one hand, they cannot undermine the authority of Allah and risk of being killed and on the other, they do not want to look like the ignorant, sadistic idiots of the 6th century who assembled this book (20-30 years after Muhammad died).