God has not commanded us to kill homosexuals. And the last thing He told us - and will tell us before the Resurrection - is the Revelation in the Bible. If anyone thinks he/she is hearing something from God, he better check the Bible. If it isn't in there, it isn't from God.
Incidentally, the stuff in the Old Testament was for the nation of Ancient Israel. Present-day Israel isn't the same nation as Ancient Israel. So God's old commands to execute homosexuals aren't even for the Jews of today.
