I understand what u mean that if Jesus(pbuh) will say "I am God"
he will be more stone to death by the Jews. But then, still they crucified him and he could have said it in the last minute of his life? But he didn't! Really peace and blessings of Allah be w/ him.

Now, you gave me the verse text of John 10:30-31, which according to you he claimed that he is God? "I and the Father are ONE"

Let's read out the context instead:

23: And Jesus walked in the temple in Solomon's porch.

24: Then came the Jews round about him, And said unto him, How long dost thou make us to doubt? If thou be the Christ, tell us plainly.

25: Jesus answered them, I told you, and you believed not: the works that I do in my father's name, they bear witness of me.

26: But ye believe not, because ye are not of my sheep, as I said unto you.

27: My sheep hear my voice, and I know them, and they follow me:

28: And I give unto them eternal life; and they shall never perish neither shall any man PLUCK THEM OUT OF MY HAND.

29: My Father which gave them me, is greater than all, and no man is able to PLUCK THEM OUT OF MY FATHER'S HAND.

30: I and my Father are one.

31: The Jews took up stones again to stone him.

If we see at the exactness of the ending of the last two verse (28 & 29), He is telling the Jews and recording the posterity, the real unity or relationship between the Father and the son.
And in verse 30, We believe he means that they are not one in Omniscience, Omnipotence or in Nature BUT ONE IN PURPOSE,
That once a believer has accepted the faith, the Messenger sees to it that he remains in faith. This is the purpose of the "Father" AND the "son" AND the "Holy Ghost" AND every woman of faith. Let us the same John explain his Gnostic mystic verbiage.

"That they all may be ONE: as thou, Father, art in me, and I in thee, thet they also may be ONE in us....
I in them, and thou in me, that they may be made perfect in ONE....(John 17:20-22)

Peace!