Welcome to the new era of outrage based cultural purges.
What a person does today can have long-lasting ramifications.
If you decided to chop off your own hand, for some misguided reason, ain’t nobody ever growing you that hand back. The permission to “have a past” is not absolute.
Sweden has never really made up with this part of its past like Germany has. It is very likely that this hidden past is one of the driving factors behind the way the country tries to portray itself as a 'humanitarian superpower' with a self-assigned responsibility to spread its particular brand of morality to those considered to be in need and an often reckless obliviousness in the way these policies do harm both at home and abroad.
The book is thus far only available in Swedish, as is the netcast series. It will be translated eventually for those who do not read Swedish but since many of the subjects it touches were already known outside of Sweden it is less of an eye-opener outside of the country.
 https://soundcloud.com/aronflam/ (search for 'svensk tiger')