Paul was addressing two groups in Galatians, the false teachers who were formerly Jewish and the converted, formerly pagan Galatians. As it would be blasphemy, both for anyone and for Paul to call God's ordained holy days anything like weak and beggarly, and since verse 3, chapter 4, mentions the elements of the world, it is clear that the elements of the world, not God is what he is addressing, or pagan beliefs.
Thanks for clearing that up. I wasn't sure where you were coming from.
Who might these be? James? Peter?
Gal 2:4 And that because of false brethren unawares brought in, who came in privily to spy out our liberty which we have in Christ Jesus, that they might bring us into bondage:
Gal 2:9 And when James, Cephas, and John, who seemed to be pillars, perceived the grace that was given unto me, they gave to me and Barnabas the right hands of fellowship; that we [should go] unto the heathen, and they unto the circumcision.
Oh yeah, funny how the Apostles that actually knew Yehoshua became the 'false brethren'.