Does accepting investments from Saudi Arabia represent a compromise of those values? Are Saudi Arabian investors attempting to limit diversity, tolerance, and freedom of expression?

I fail to see how accepting investments from Saudi Arabia is selling once's soul or compromising on those values. If anything, the fact that Saudi Arabia is diversifying its investments and becoming invested in the economies of Western countries is likely a driving factor of their latest pushes towards more egalitarian (but, relatively speaking, still backward-as-hell) values.