How to turn Self-Defense into Manslaughter

In August, Michael Drejka was convicted of manslaughter for the 2018 shooting of Markeis McGlockton.  Mr. Drejka was a concealed carry permit holder in Florida.  He shot and killed Mr. McGlockton after getting into a fight over a parking space.
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This is such a tragic situation for all involved.  Apparently, Mr. Drejka had words with Mr. McGlockton's girlfriend who was sitting in a car with her kids waiting for Mr. McGlockton inside a store.  Drejka was upset that she was parked in a handicapped parking space.

It appears that Mr. McGlockton showed-up when Mr. Drejka was arguing with his girlfriend and shoved him to the ground.  Drejka then drew his gun and shot McGlockton.

From the article:
"When I just say something to a person about being parked there, I don’t expect it to go where it went," Drejka told the detectives.  Moffett pressed him, asking if he was concerned about prompting a violent confrontation when he previously complained about people parking in handicap spaces.  Drejka answered, "That's why I take precautions. I'm a very careful person. I have a [concealed weapon] permit."

I definitely understand why Drejka was convicted.  In essence he picked a fight.  When it escalated, he shot the guy.  When we carry, we need to have the mindset that we want to do everything we can to avoid using our gun.  Yes, we should be confident in our ability to defend ourselves but we should not be walking around looking for a fight.