I have come to see that people of "faith" are divided into 3 types:
Those that believe the trinity
Those that don't
Those that "don't care" either way.
Those that believe the trinity will see your "proof" and agree, those that don't will see it an disagree and those that "don't care" will see it and understand your point ( even if they don't agree) but will also understand the point of non-trinitarians.
The truth is somewhere in the middle I think, simply because many anti-trinitarians have the wrong idea of what the Trinity is and that is the fault of the teachers of chirstianity.
As you can tell by Blue Grass's response, the very "evidence" you show is to him/her ( sorry I don't know which one you are BG) is not only not enough, it is in same cases "proof" against the Trinity.
How can that be?