It took me about 30 seconds. It was obvious to me that the tweet was missing context so I had to read the thread. Which wasn't very long to begin with.
The UI does not clearly present the prior tweet in a conversation when linking to an individual tweet. This makes it easy for people to ignore the context since they have to work to see it. Combine this with the preference for using real names and it is easier to make the "look at what an asshole this person is" posts.
This is exactly how twitter is intended to work.