Butter, the man is a fool. Paying attention to him only makes us dumber. Disregard anything he has to say as not worthy of response. The only exception should be efforts to shoo him away.
This literary usage by Jefferson is correct, and has been remarked on for centuries, and leave it to this fool to attempt to correct what is actually on the document.
I wouldn't waste one nanosecond thinking anything he says might be correct. If it's coming from him, it is likely to be dead wrong. You just can't get that stupid without willful determination.
As a point of interest, Jefferson used “inalienable” in the Declaration of Independence
Jefferson’s copy
http://memory.loc.gov/master/mss/mjm/27/0700/0743.jpg
Jefferson’s rough draft
http://memory.loc.gov/master/mss/mtj/mtj1/001/0500/0545.jpg
Both of which can be accessed through
http://www.loc.gov/rr/program/bib/ourdocs/DeclarInd.html
under the heading “The James Madison Papers” and “The Thomas Jefferson Papers at the Library of Congress”
The engrossed version uses “unalienable”