You are dodging the question after asking for evidence :-)
As far as I can see, some are Hindu in external form only, while others are Hindu in spirit. There is a whole spectrum of approaches to Hinduism which need to be understood instead of using black/white categories to label someone as Hindu or not-Hindu.
I won't digress from your main topic unless you want to continue this thread, but I had to ask my question since you seem to be promoting an inherent distrust of white women who turn to Hinduism which is not fair, because many of them are attracted to Hinduism after being repelled by rigidity of Abrahamic religions.
This is unfair to white men as well, against whom you don't seem to have any issues.
As far as the Mirra Alfassa is concerned, I have found that many Indian men (and in Sri Aurobindo's time, some of his male disciples as well) seem to resist accepting her spiritual stature after gaining cursory information about her. They eventually drop their inhibitions after learning more about her. Maybe some day you will undergo the same evolution.
Reports of women and children harassment put #AurobindoAshram under SC scanner http://t.co/mU0r6O2V4a - http://t.co/iQnIO4qtBR
@NekkantiR There are many other issues which need to be seen together.
[Sri Aurobindo instructed Kapali to stick to his interpretation while continuing the work of interpreting the Veda.] https://t.co/OQjTz7ZYNK
Sri Aurobindo and Hinduism by Peter Heehs on @Scribd: http://t.co/3NL1A5Cewk #ReadMore
#ScribdDocs - Sri Aurobindo: A Forward-Looking Traditionalist by Peter Heehs https://t.co/jo0kkW0GgW
The Mother's Evolutionary Vision by Peter Heehs (from EvolutionNext, 20... on @Scribd: http://t.co/dnUyB3powA #ReadMore
Sister Nivedita to Julia Roberts: some Westerner converts to Hinduism. http://t.co/Jzpl1WTBnY - http://t.co/9xJDWFbNYU