Have owned 2 different pits in my life. It's 100% about how you raise them. With that being said, you can't really know since you don't know who raised the dog.

He is probably a racist after being forced to fight. Use a higher caution level if you take him around blacks.

This is actually valid. Although it sounds retarded. One of my dogs was racist. Not because of fighting though.

My cocker spaniel is racist. Always goes crazy around them. Bit a little 3 year old girl once.

its a known fact dogs have heightened senses to that of humans, for instance sense of smell, also a 6th sense of ability to judge character

Yea I was trying to be humerous with it. But my grandpa had a pitt that was nice until it saw a black person. He actually jumped out of a moving truck one day after a black guy who was forced to retreat in a store. < this was before I was born. my grandpa died before I was born.

if you had to estimate it's age, does it look like a 6 month old, 2 year old, 7 year old? Should be fairly obvious. Take it to a vet asap.