Nope, you are not a sex nazi or whatever.
You had a bit of unprotected fun and this time it did not quite work out the way it mostly does. We all know that shit happens to all of us.
Now, you did two good things in my books, that is. You got treated and you alerted other guys, so that they could go and have the bug checked and treated, too.
I already know a few guys (some str8, some gay) who came up with the same basic story. They did not think oral was dangerous, etc. Now, they have stepped into it and it feels like...
All of us want/ought to read your post. You want to make a qualified and educated decision for yourself. Do you want to take such risks or would you rather have a condom over your dick and minimize your risks?
Youd shot guys...
KD