I am pretty sure they are not even a script kiddie... they are just a fairly immature troll.
Not sure what caused the original email, but the reply is just a copy/paste of various unrelated things and security incidents that the person Googled without even understanding enough about them to form a comprehensible narrative.
Which tells me they are simply trying to get a rise out of someone.
The way the grammar is constructed I would not be surprised if this came from a pre-teen.
I've been in the government contracting space for about six months but those emails look to me to be about the level of competency I'm seeing with many of my colleagues. Spaghetti code with no unit tests and nobody knows how to use a debugger let alone a profiler. Getting irrationally mad at open source devs for making changes as if they were supposed keep the Jira tickets they were working on in mind specifically. Lack of ownership. Finger pointing. This looks quite real to me.
A better analogy is a screwdriver. He made a screwdriver. Screwdrivers have millions of legitimate and essential uses. How would you build anything without one? But a criminal could also use the screwdriver to open stuff he's not supposed to. Blaming the screwdriver manufacturer for that is pointless.
Trolls prefer to use public fora in order to upset the greatest number of people possible. They don't target individuals through private correspondence.
Not sure what caused the original email, but the reply is just a copy/paste of various unrelated things and security incidents that the person Googled without even understanding enough about them to form a comprehensible narrative.
Which tells me they are simply trying to get a rise out of someone.
The way the grammar is constructed I would not be surprised if this came from a pre-teen.