Not OP, but maybe it’s better phrased as “white Americans have a limited shared cultural heritage.”
Waves of immigration make it hard to tell what of that 5 centuries is actually shared. It’s also viewed as tacky to try and lay claim to the bit before your ancestors arrived.
If your ancestors were Irish and Italian immigrants from around 1850, going off about the Mayflower can be viewed as similar putting on airs
I keep seeing people talking about it being too dark. I’m not sure what that could mean, why wouldn’t you want darkness?