No.
1.We are talking about slavery of black people because it is relevant to events happening today and in the wider context of racism within the society in which we happen to live. You, and others, appear to be arguing that in order to discuss one specific aspect of slavery, the Atlantic Slave Trade, we must first a) acknowledge all slavery is bad, b) has been going on for thousands of years and c) others were at it as well and were a lot worse than us. In effect you are telling black people, and others, that there are pre conditions that must be met before we discuss their specific situation.
If I discuss a specific crime, say a murder, I am allowed to do so. I do not have to first a) acknowledge all murder is bad, b) has been going on for thousands of years and c) that there are much worse murders.
2. This is symptomatic of what I am saying. The hurdles that must be jumped in order for people’s protests to be ‘legitimate’. They are accused of not campaigning against slavery ‘per se’ but only how it impacted on their community. As if somehow that reduces the validity of their claims and therefore can be dismissed. They are being selfish, as if every other fucker is going around virtuously campaigning against the evils of slavery. Are you? Did I miss the big meet up?
All this fannying around, ‘yes, but, no, but what about the pyramids’ is fucking tedious.