Fools need everything spelled out for them.
Search the Bible and you will notice the Holy Spirit, the very Spirit of God who is of the essence of God. Notice the LORD who is the Father. Notice the Son of Man who is the Son of God who is called "Lord" in Psalm 110:1 and is seated at the right hand of the LORD. The Trinity is who God is, and that is evident in scripture. The Trinity is just our word to describe God.
You could drop the arrogance as well. I am not a fool.
God, Jesus, and the Holy Spirit appear in the Qur'an as well, yet Muslims have no problem with worshipping One God, One Being.