The phrase "shameful period" refers to a time or period in someone's life or in history when they feel deep embarrassment, guilt, or disgrace about certain actions or events. Full definition
This is not meant to be appealing music, it is meant to be powerful music, commentary on one of the most shameful periods of mankind's history. (movie-wave.net)
President Obama angrily denounced Trump for his remarks in the aftermath of the Orlando massacre, warning that the presumptive Republican presidential nominee was peddling a «dangerous» mind - set that recalled the darkest and most shameful periods in American history. (nystateofpolitics.com)
In just a handful of scenes Django Unchained reminds us that it is a film set in one of the darkest and most shameful periods of American history. (blog.cinemaautopsy.com)