Before answering you, let me remind all that neither the aliens nor the MJ-12 overseers confide in me, so I am only offering my beliefs.
To my knowledge, abductees represent all nationalities, races, religions, sexes and philosophies. The only common denominator seems to be family.
Apparently, certain selected families are tracked through the generations. This may have something to do with the accounts of sperm and embryos being
taken from human abductees. There seems to be a great interest in human reproduction. One scary concept is that UFOs are time machines from the future
where they are trying to recover untainted or unmutated human DNA.