Did I do any wrong by doing this?

First of all, forgive me, for my poor English as it isn't my native language.
Anyway, hear me out guys!!!!

So I had a friend, we were friends for 15 years.
I always considered her as my sister

I'm in university right now, a classmate of our previous school, he texted me that my friend and he had a fight and my friend blocked him over all her SNS.
That guy, started badmouthing my friend, her family, her sister and lastly said he would kill her as revenge for blocking him on sns

I got scared (this guys was obsessed with my friend) and immediately send all the screenshots of our chats and warned her to beware of him.

After few days, that guy spammed me and started cursing at me and said he would take revenge on me blah blah, he said that my friend already told him that I send her the screenshot and told her to stay away from him. I blocked him.

This went on for 4 months, my so called best friend ignored my messages,
After 1 year , that guys texted me in another number and beg for forgiveness, but I didn't forgive him.
He told all the dirty truth of my so called best friend, he sent me all the chats between him and her, where she was (for entire 5 years) badmouthing me, my parents, our other friends blah blah .. that guy said that my friend says that I'm dumb , idiot , clingy , unpredictable and more more. I had all the screenshots with me.
And she knowingly ignores me , and avoids my messages because she doesn't want to be friend with me anyway

From that day , I deleted her phone no. and I had my other friends whom I send all these chats, they couldn't believe it that.

It has been 2 years since I blocked her
I even deleted my SNS and I feel good now.
I never expected that she was a double face bitch.