I think I always looked at my son's diagnosis as a key to unlocking the best ways to help him manage, and not as a source of despair and anxiety.
Me was highly aggressive, sensitive to certain things, explosive without warning and insensitive to the feelings, expressions and opinions of others.
Once he was diagnosed with Asperger's, the thousand piece puzzle had a name, I could start looking at support and strategies and talk to others for tips and ideas.
Rather than seeing him as badly-behaved and rude. It also changed other people's perceptions of him, and increased their willingness to be proactive and consistent.
So yes, I can relate to what you say, but I'm on the other end of the see-saw. 