Regarding the remainder of your comment, I urge you to read Dr. Michael Newton’s “Virtual Gael” blog post on cultural appropriation. It addresses much of what you express but from the perspective of the Gael and Gaelic culture and experience. There is no reason for me to restate his points here as they meet your comment head on and are exceedingly well stated. The link to Dr. Newton’s post: https://virtualgael.wordpress.com/2013/08/30/cultural-appropriation-gaels-and-other-natives/

Also, lets stop circulating the rumour that the kilt is Victorian. This is at best a half-truth. The Victorians did help with clan classifications, but even that late development began in the Georgian period with Sir Walter Scott. It was Scott who really created the romantic notion of our national dress, and even that was an updating of previous versions of the kilt, which go back at least to the 1500s. The Victorian argument to dismiss the kilt is a disrespect to those who fought, albeit foolishly, in the ’45, causing George III to ban the wearing of same.
By convincing George IV he was Scottish, Scott’s work planning Georgie’s visit to Auld Reekie gave Scotland a national dress to be proud of, allowing other areas of Scottish culture to flourish in the 19th century, where it had stagnated under a more repressive thumb in the previous century.