Here in Victoria BC the situation was much worse that giving First Nations smallpox infected blankets. Natives knew about smallpox, and about how Europeans got vaccinated as one of 3 main control tactics during the epidemic of 1862, but "neither doctors nor nurses were willing to take the risk involved in caring for natives with small pox".

http://web.uvic.ca/vv/student/smallpox/doctors/rates.html

Trying to make me feel guilty about that won't work, but it is not something to make my wife or our children proud of their Colonial Era ancestors in Victoria, or to deny what really did happen, any more than a Confederate Army Ancestor is a valid reason to pretend that the Civil War was not about Slavery and buy a Confederate flag.

My daughter was on the Amundsen during its Arctic Research Cruise last summer. The problem with being stuck on a boat is that you can't get away from an obsessive nut case. On land you can just walk away.  Hard to do that during an Arctic Cruise.