no, that isn't your duty. If it was soooo important then it would be extrordinarily easy for god to come on down and say so.
I've never claimed islam to be true. Personally, I feel that humans have attributed so much of their own personal feelings (be they hate, love, bigotry, etc.), to any and every religion that placing your eggs in any basket is a foolish thing to do.
Realisticly, I can't think of a better tribute to the creator then to be good to his other creations and enjoy what he made in a civilized manor.
I seriously doubt if god cares that you feel the need to warn people about his other creations.
The warning began with God in the first place unto all mankind. Yeshua represents the Word of God who came down to tell us the following:
(Please take the time to read them and pray to see if Yeshua is telling the Truth)
Yeshua said: “My doctrine is not mine, but His that sent me.
If any man will do His will, he shall know of the doctrine, whether it be of God, or whether I speak of myself. (John 7:16-17)
Yeshua said: “I am come a light into the world, that whosoever believeth on me should not abide in darkness.” (John 12:46)
Yeshua said: “All power is given unto me in heaven and in earth.
Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:
Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you alway, even unto the end of the world. Amen.” (Matthew 28:18-20)
Yeshua said: “It is not for you to know the times or the seasons, which the Father hath put in his own power.
But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judaea, and in Samaria, and unto the uttermost part of the earth.” (Acts 1:7-8)
Yeshua said: “The children of this world marry, and are given in marriage: But they which shall be accounted worthy to obtain that world, and the resurrection from the dead, neither marry, nor are given in marriage:
Neither can they die any more: for they are equal unto the angels; and are the children of God, being the children of the resurrection. (Luke 20:34-36)
Yeshua said: Verily, verily, I say unto you, He that entereth not by the door into the sheepfold, but climbeth up some other way, the same is a thief and a robber.
But he that entereth in by the door is the shepherd of the sheep.
Then said Jesus unto them again, Verily, verily, I say unto you, I am the door of the sheep.
I am the door: by me if any man enter in, he shall be saved, and shall go in and out, and find pasture. (John 10: 1, 2, 7, 9 )
Yeshua said: “I am the resurrection, and the life: he that believeth in me, though he were dead, yet shall he live” (John 11:25)
Yeshua said: “I am the way, the truth, and the life: no man cometh unto the Father, but by me.” (John 14:6)
Yeshua said:
“Blessed are the poor in spirit: for theirs is the kingdom of heaven.
Blessed are they that mourn: for they shall be comforted.
Blessed are the meek: for they shall inherit the earth.
Blessed are they which do hunger and thirst after righteousness: for they shall be filled.
Blessed are the merciful: for they shall obtain mercy.
Blessed are the pure in heart: for they shall see God.
Blessed are the peacemakers: for they shall be called the children of God.
Blessed are they which are persecuted for righteousness' sake: for theirs is the kingdom of heaven.
Blessed are ye, when men shall revile you, and persecute you, and shall say all manner of evil against you falsely, for my sake.”
Rejoice, and be exceeding glad: for great is your reward in heaven: for so persecuted they the prophets which were before you. ( Matthew 5: 3-12)