Did you read the first post? - "You have no idea how hard it was to get this information." "I could see he was very reluctant about me knowing his first name so I decided not to mention it again."
I did read the first post.
Maybe the guy was just shy to give details, as is normal for people.
If the guy didnt want him to say his name then he should have said when he told him.
OP obviously made a mistake and wouldn't have said the name if he was told the guy didn't want him to. So the fact the guy stopped communicating with him tells me he didnt give a damn about the friendship anyway.
If you're in a friendship then you have invested time in the other person. To walk off risking the friendship then he didnt invest much in it.
x-st, if you don't want people knowing your first name then 1. don't tell people, or 2, if you do tell someone tell them not to say it in open channel. If the person then says it in open channel then I can agree it would be a trust broken.