Rav Moshe was not the first to permit chalev goyim.
The pre-expulsion 12th and 13th century English Tosafists permitted it along with bread and beer.
( See Tosafos Avodah Zara 31B)
Reply: Yes, but L'halacha we do not hold that way. Rav Moshe did not permit Chalav Goyim, he says it is considered Chalav Yisrael. Your statement is possibly, a bit misleading.
Sorry. Didn`t mean to mislead. I just thought it a fascinating historical observation. We English were always a little odd!!!!