Whites didn't kidnap blacks. Blacks in Africa did, then sold them to JEWS who shipped them to the US and SOLD them (at a considerable profit)
Even if all slave traders were Jewish, which I am certain is not at all true, and indeed I am pretty sure that there were plenty of gentile traders from all over Europe… it was the planter class of the European colonies who were generating this massive demand.
The first slaves in the US were the IRISH!
No, that would be the natives. Their exploitation was so harsh that it generated backlash and also a severe depletion, so the Pope banned it… and sanctioned entering the West African slave trade instead, declaring black people soulless.
And yes, the West African slave trade preexisted and the various kingdoms that sold the slaves knew pretty damn well how their… wares were treated at their destination, which it why each strictly prohibited the export of its respective own people, and the European elites treated even their own compatriots - let alone foreign Europeans and/or those of the wrong brand of Christianity - horribly and in some cases arguably barely better than slaves. But none of these in any ways justify the atrocities of Trans-Atlantic Slavery.
There is a line between historical nuance and whataboutism, and you are very firmly on the latter side.