To show them once and for all that Reincarnation is real, and that we Reincarnate through our Race.
The best evidence for Reincarnation is the work of Dr. Ian Stevenson, and in his research he showed that ALL confirmed cases were same Race Reincarnation.
White people now a days will only be compelled to assist, if there is some benefit in it for them, and what greater benefit than living life once again as a White person?
On the opposite side there are those that think, and say
"I don't too much care about what happens to my Race, I will be in Heaven"
What if Heaven is in the continuation of the Race?
Confirmed how? Natural science doesn't apply to supernatural events.
https://med.virginia.edu/perceptual-studies/wp-content/uploads/sites/360/2015/11/REI36Tucker-1.pdf