I am in no way comparing the Cardassians to the KKK. The KKK is just a semi-organized group of racist red necks that like to play dress up, drink, and hate on non-whites. The Cardassians had an actual cause for enslaving the Bajorans that was not based on hatred. They saw an inferior race and they took it upon themselves to subject and enlighten them. If there is any hatred towards the Bajorans now it is only because it reminds them of their own weakness of not being able to occupy Bajor for longer than 50 years. The free Bajoran is just a reminder of that weakness.