Samaalic Era
QurboExit
You said don't be ashamed of your "culture", referring to slavery. You SHOULD be ashamed of the fact that your grandfather apparently owned 20 slaves.
Nearly all the clans except a few owned slaves. The northern clans had xabashi slaves while the southern clans had oromo and bantu slaves.
Taking captives was and still is a symbol strength. Just has being enslaved is humiliating for the enslaved and their descendants, the slave owners and their descendants feel pride in taking captives.