I find it very interesting to trace the lineage of Buddhism from Theraveda, through Mahayana, to Vajrayana, to Zen. Buddhism has a way of taking on the shape of its container, so to speak, to some degree. Each new culture adds to and takes away from the traditions involved in its practice.
While there may be depths of any tradition that are simply not accessible to those who were not born to it, I have found it quite possible to pass through the religions of the world and learn what I can from them. I don’t feel this is appropriation until I turn around and say I am the expert in what I have learned. Clearly this cannot be the case given my tourist status.
Americans have existed in such a melting pot of cultures for so long (with uneven respect for the origins of said cultures) that it can often become difficult for us to identify this type of appropriation when it occurs. I find the antidote to this confusion is to learn more about the roots of the traditions in question. When we settle for “new age” re-packaging, we are accepting another tourist’s picking and choosing of their opinion of the greatest hits. Maybe a band’s Greatest Hits album is the first one you buy, but you wouldn’t want to stop there?
So, it becomes a process of ever-further-humbling, as the more you learn, the more you realize you have yet to learn. As your wisdom grows, so too, often your respect for the traditional roots of that wisdom may grow. Appropriation never comes from a place of respect for wisdom. If you are coming from that place, you need not have fear.