1. You do not martyr yourself. That is a Muslim attitude. Our lives are demanded of us because of our faith in Christ. Mark 13:13.
2. A martyr isn't a martyr out of hatred for those who take his life. He offers his life for the sake of Christ Who may take this sacrifice and save his captors. There are many historical examples of conversion by witnessing the faith of martyrs.
Christ on a crutch, I know! I was being glib. My point is that it ain't "Off to Hell with ya" if you pretend to accept Islam, unless you fail to make penance afterwards. Christ's mercy is boundless for those who give Him their heart.