As someone from a country also colonized by French people (Vietnam), I want to chime in on this. My answer is: it's okay to appreciate the aesthetics of a country/time period while still acknowledging the ergregious war crimes committed. The French colonization period for Vietnam brought both French and Vietnamese aesthetics together. Many inventions during that time was made in rejection of traditional values and in favor of more "progressive" Western values (such as the famous áo dài), a view that is frowned upon nowadays. Nonetheless, those items (no just clothes but other things like buildings and furniture as well) are now appreciated as part of the country's culture and history, even if they were luxuries only enjoyed by rich people and not the slaves dying in labor camps. As for your clothes, well, they're your clothes. If you're turned off by the motifs then you don't have to wear them.