They desire (ορεγοντα). Present middle indicative of ορεγω, old word for stretching out after, yearning after as in 1. Timothy 3:1.

Their God (θεος αυτων). Predicate nominative with the epexegetic infinitive επικαλεισθα (to be called) used with ουκ επαισχυνετα (is not ashamed).