Well they were all brothers of Christ even peter, but Bartholomew is known to have instantly have faith in him after his initial prejudice. Meaning he thought Christ would have been a different race. As for Judas being james blood brother this is also true, but Judas carried the curse and James got the blessing. Similar to Cain and Able. Obviously they both got the curse of death but Judas got the worst of it by suicide- James fell like Jesus in the hands of Capitol punishment