[But by saying this] you are witnesses [against] yourselves, that you are the sons of those who murdered the prophets [i.e., indicating your approval of their actions].
for they [even] try to prevent us from speaking to the Gentiles, so that they can be saved. [In doing this] they are always piling up one sin on another. But the wrath [of God] has come upon them at last [or, “completely”].