The Christian trinity makes perfect sense

It would be unnecessary for G-d to speak to "another manifestation of himself," because He is able to know His own thoughts and plans. The only case where He would have to speak to Himself would be if He was limited to the laws of His own creation. However, the impression that we get from the Bible is that G-d is not limited, but that He is omnipotent and omniscient. * Genesis 1:26, 3:22. The "our" and "us" in these verses are not proof that G-d is a trinity. The Bible was probably referring to the angels, who were created before Adam was created. * (Genesis 3:15) "And I will put enmity between you and the woman,"and between your offspring and hers; he will crush your head, and you will strike his heel." This is not a Messianic prophecy by any stretch of the imagination. Nothing in this verse explicitly refers to a messiah, but even if it does, why should we believe that Jesus is this messiah? * Deuteronomy 32:43 is not about the messiah, it is about the nation of Israel. The context supports this. (Deuteronomy 32:6-10) "Is this how you repay the L-rd, you disgraceful, unwise people?! Is He not your Father, your Master? He has made you and established you. Remember the days of old; reflect upon the years of [other] generations. Ask your father, and he will tell you; your elders, and they will inform you. When the Most High gave nations their lot, when He separated the sons of man, He set up the boundaries of peoples according to the number of the children of Israel. Because the L-rd's portion is His people Jacob, the lot of His inheritance. He found them in a desert land, and in a desolate, howling wasteland. He encompassed them and bestowed understanding upon them; He protected them as the pupil of His eye." The entire chapter is about the Israelites, the descendants of Jacob, whose mission is to be a light for the nations. (Isaiah 42 : 6) "I am the L-rd; I called you with righteousness and I will strengthen your hand; and I formed you, and I made you for a people's covenant, for a light to nations." (Isaiah 49 : 6) "And He said, "It is too light for you to be My servant, to establish the tribes of Jacob and to bring back the besieged of Israel, but I will make you a light of nations, so that My salvation shall be until the end of the earth."" When the Israelites are righteous, they help the entire world. (Genesis 26 : 4-5) "And I will multiply your seed like the stars of the heavens, and I will give your seed all these lands, and all the nations of the earth will bless themselves by your seed, Because Abraham hearkened to My voice, and kept My charge, My commandments, My statutes, and My instructions." * My opponent still did not explain how the following verses are not clear contradictions of the Christian concept of the trinity. (Deuteronomy 6:4) "Hear, O Israel: The L-rd is our G-d; the L-rd is one." (Isaiah 44:6) "So said the L-rd, the King of Israel and his Redeemer the L-rd of Hosts, "I am first and I am last, and besides Me there is no G-d." (Isaiah 46:9) "Remember the first things of old, that I am G-d and there is no other; I am G-d and there is none like Me." (Zechariah 14:9) "And the L-rd shall become King over all the earth; on that day shall the L-rd be one, and His name one."