JWs are mistaken when they believe the Bible teaches that foreigners were not participants of the law covenant.
(the 'slave' teaches this in order to create a type/antitype for the 'anointed' and the 'other sheep.' wt 98 2/1 p.19, par. 6) Deuteronomy 29:10-15 rejects this false teaching.
@ COFTY - the intolerance of some people when Bible topics are raised, is very disheartening to many here IMO.