Whose words are these?
Rev_22:13 I am Alpha and Omega, the beginning and the end, the first and the last.
Jesus!
Earlier in Revelation...
Rev_1:8 I am Alpha and Omega, the beginning and the ending, saith the Lord, which is, and which was, and which is to come, the Almighty.
...saith the Lord
So Jesus is Lord.. God..
Joh_14:9 Jesus saith unto him, Have I been so long time with you, and yet hast thou not known me, Philip? he that hath seen me hath seen the Father; and how sayest thou then, Shew us the Father?
Seeing Jesus-- is seeing the Father...
Jewish concept of agency acts here.. whenever Jesus was speaking about being from the Father.. doing things by the hand of the Father.. etc..
This is like saying the Jews.. I am the same as the Father. Saying I am God.
This is a big part of the reason why they crucified Him. They knew if someone was claiming what Jesus was... they were claiming to be God.