I find it difficult to spot the bad apples in general.

Is it any more difficult in Sinti and Roma, in Muslims, in Africans, in redheads, in Irish than in WASPs?

Or is the implication that the baserate of bad apples is higher in Sinti and Roma?

Then I have a severe warning for I know a subgroup of humans you really should distrust: Young males. Among them, the base rate of bad apples is really so much higher than in females that you'd better trust none of them.

Wolfgang