PS: They look white. They are certainly not 100% ethnically Indian.

As for the rest…I don’t even know where to start, but cultural appropriation is generally about cultures today, not 100 years ago. Greek culture today isn’t about this stuff and Indian culture is.

Whether or not Indian astrology came from Greek astrology is a subject of a lot of debate with no clear historical answer. Nonetheless, it is not appropriate to say that because some parts of a culture originally came from white people, white people can do whatever they want with any adaption that then followed over thousands of years. (I mean, they can legally. I think it’s not a woke idea because it’s causing real damage. Other people will disagree.)