"They were very angry." The Sadducees, in particular, would have been angry about what Peter and John were saying because they did not believe in resurrection. (See: [[rc://en/ta/man/translate/figs-explicit]])
Peter and John were saying that God would raise people from the dead in the same way as he had raised Jesus from among the dead. Translate this in a way that allows "the resurrection" to refer to both Jesus' resurrection and the general resurrection of other people.