It seems as though "strange" or "foreign" apparel is referring to people who our "outside" of God's people. I noticed that in several places God mentions things similar to this, such as "strange tongues" or languages, and it seems to be used to indicate those that are from foreign lands that are enemies of God's people.
And Robin:
you cry "Context, context, context" more than a real estate agent cries, "Location, location, location." I like it! Keep it up!