there was a huge war. Bloodiest war still to this day in American history

That the slave states started in order to force other states to allow slavery. And only the bloodiest American war on American soil. The US military has killed a lot more people in subsequent wars.

With the end result being that slavery ended.

Only chattel slavery. While unquestionably less horrible, penal slavery was explicitly allowed by the 13th amendment and is practiced to this day.

There's significantly more people legally enslaved in the US today than there was before chattel slavery was abolished.

Now, you can say racism didn't end after that

If you want to go for the understatement of the year award, yes, you could do that.

But on the scale of atrocities, racism, then slavery, then mass extermination camps.

As I explained above, slavery is still a thriving industry, more so now than ever.

As for extermination camps, it's just a matter of time now that the fascists have taken over and started building the first concentration camps.

America DID NOT get away with slavery

America IS getting away with slavery.

your logic does not hold up

clears throat

I'm just saying if Hitler looked at an already failed policy

He didn't. The Jim Crow laws that inspired him were EXTREMELY successful at oppressing and marginalizing black people and continued to be so until long after Hitler's defeat and death.