ethnocentrism may potentially play a dangerous role in preventing the comparison of other criminal justice systems around the world to that of the US criminal justice system?

Yes

Explanation:

Ethnocentrism may lead to Isolationism, and then to think that the U. S. Criminal Justice System needs no improvements, no corrections whatsoever in the House of Representatives, Senate, etc. Hence, yes Ethnocentric views may potentially play a dangerous role in this matter.