My hope is that you can enlighten this person through this email (are more importantly through a personal interaction (at a range, etc.). I also hope you can maintain a friendship and create more of a conversation than an internet argument. To that end, a few suggestions:
1) Do not open with a dis. It's never a good tact.
"You probably think anything outside the Ivy League..."
is just a thinly veiled way of saying "you're an elitist ******* who clings too strongly to
your convictions while
I'm reasonable because I cling strongly to mine." Honestly, that line makes you sound petulant, like an Internet Aruger rather than a citizen concerned with the truth and fact.
Why not just open with your agenda? "This information is from a reputable source and I hope you read it so you gain some clarity on my position..." and continue.
2) The Janet Reno thing. Why is it important to you that someone on "her side" recant what Reno said? Why is that even pertinent to the discussion you are having with her? Is your friend accountable for something Reno said 15-20 years ago? (Hint: she's not.) Why even bring this up with her? It' evidences nothing pertinent to the utility of RKBA. It doesn't shed a bit of light on your agenda which is getting her to realize the sensibility of what you are saying about a ban.
3) You talk about taxes, immigration, spending, etc.. Why? I thought we were talking about the RKBA? Again, you're attacking her for things others have done, and your stated goal -- in the title of your post -- is to "reason with her" about the second amendment. I find that when someone is trying to reason with another person, there is absolutely no need to bring up ancillary issues. "But you said I could have a new bicycle! Great, what's that have to do with cleaning your room?"
Stick to the issue of the RKBA. Don't let her distract you or be distracted by these other issues. Why? Because RKBA is
supposed to be bigger than politics. It's s
upposed to be bigger than ideology. If you entangle it with these things then it becomes indistinguishable from them and just becomes some petty, political issue rather than the Right granted to us under the Constitution.
4)
By the way, the shooter at Sandy Hook was an undiagnosed schiozophrenic who had his family hiding him rather than getting him the care he NEEDED, because they're a Money/Socialite Family
I want to see citations for this because to date there is absolutely zero objective, clinical, forensic proof of Adam Lanza's psychological status. Speculation? Yes, from unnamed neighborhood friends, an unnamed son of a pastor, and an unnamed LE Official. There has been no clinical assessment of his brain, no history of psychiatric treatment, diagnosis, or assessment. There is speculation from unnamed, untrained, and unverifiable sources.
Within the context of RKBA, where we hold other people to a standard of showing actual evidence for their positions, to throw out there something like this is irresponsible and hypocritical. And, again, it simply detracts from the facts you CAN and HAVE supported.
Finally, the last paragraph where you "withdraw the range invitation" -- sorry, but it just sounds petulant (again).
Logic isn't dictating she shouldn't benefit from the things she thinks people should not have,
you are. Do you REALLY want to "disinvite her" and thwart what enlightenment may come from a range visit?
I would wager lunch on one thing -- there is more clarity to be gained (for her and you) from your personal interaction with one another at a range than there is from some email either of you send, no matter how well that email gets vetted by the choir.