What's the point in a multicultural society if any involvement in their culture is criticised as "cultural appropriation"? Are they implying all cultures should stay segregated? Because that is what causes division and racism.
Only teal issue I can see is using somthing meaningful without understanding it/misusing it. When grabbing stuff from other cultures it would be useful to reasurch it a little. I gues its hard for me as a US guy to get the issue cuz we often push our culture on others and mock it