"trouble" = to complicate; problematize.

[Jonathan Lighter]

Google Books' blurb - apparently from a review - of Robert N. Proctor's _The
Nazi War on Cancer_ (Princeton U.P., 2000):

"His treatment of smoking and cancer will be a revelation. This book
troubles the politics and ethics of historical interpretation in the very
best ways."

(Literally about Nazis vs. Cancer.  They didn't want Aryans to get it.)

JL

--
"There You Go Again...Using Reason on the Planet of the Duck-Billed
Platypus"

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The American Dialect Society - http://www.americandialect.org