Paul contradicts himself.

Here is what Paul says.

Galatians 2:6(NKJV)

But from those who seemed to be something—whatever they were, it makes no difference to me; God shows personal favoritism to no man—for those who seemed to be something added nothing to me. 

And here also is something that Paul said one chapter later.

Galatians 3:26-29(NKJV)

For you are all sons of God through faith in Christ Jesus. 

For as many of you as were baptized into Christ have put on Christ. 

There is neither Jew nor Greek, there is neither slave nor free, there is neither male nor female; for you are all one in Christ Jesus. 

And if you are Christ’s, then you are Abraham’s seed, and heirs according to the promise.

So through our faithful belief in Jesus we are heirs to the promise of Abraham.  And if we are heirs that means we will be treated differently than those who are not heirs does it not?  Therefore God does show favoritism to some men over others doesn't He?