This is a false dichotomy. It was BOTH.
The shooter self-identified as a "Sovereign Citizen." His mental illness made him more vulnerable to stochastic terrorism. 1/
time.com/5249531/nashvi…
vox.com/2016/8/10/1242…
Clearly, their toxic propaganda radicalized this mentally ill man. 3/
nytimes.com/2018/04/23/us/…
Online radicalization isn't just for ISIS any more. 😔
/END
nymag.com/selectall/2017…