He writes at the Huffington Post:
Let's see, there are 26.1 million annual tokers, 17 million monthly tokers, and 2 million daily tokers in America. Two of them are alleged terrorists. That's literally, at best, a one-in-a-million risk.
But friends told reporters that Tsarnaev was a true stoner -- a daily toker.
What that meant for his state of mind is anyone's guess.
For us the biggest thing these three guys (Tsarnaev, Holmes and Loughner, not to mention Seung-Hui Cho, the accused Virginia Tech shooter) have in common is that they're men from the same generation -- young psychos allegedly bent on destruction.