Peace Lady Fatima,
When Jesus said "I and my Father are one"
This is not out of context.
What do you really mean?
"That they all may be one; as thou, Father, art in me"
Actually this is an analogy.
Jesus wants all of us to be united in one Spirit.
Making sense, right?
"not about a plurality of gods merged into one body"
We don't believe this.
Lady, the Trinity is God, can it totally be cohered?
Can it totally be explained?
Can you explain God's Divine Form to me?
Are you that arrogant?
Also, Mark 16:17-18 is telling us that FAITH makes these all possible.
If you had enough faith in God you can do all sorts of amazing things.
But, this isn't for entertainment, so playing with a venomous snake to prove somthing will prove nothing.
Have I helped you?
Blessings