Islam doesn't practice blood sacrifice as they believe that "God neither eats nor is He fed".. The do not domesticate God. Man needs God. not the other way around.
I have always thought that God must have had some plan for the Jews and the Arabs as well as the Christians.
Sad but true. They cannot sacrifice to cleanse themselves of sin according to the law and they do not accept Jesus' payment of their debt according to grace. They don't have any other options. No man comes to the Father except through Christ.
God does have a plan for the Jews and the Arabs. He planned (and plans) for them to accept His son and become His children. Unfortunately so far they have refused to do that.
GSA(P)