Upvote:2
From a straight-forward reading of First Thessalonians, it is hard to understand what wrath God wrought upon the Jews to such an extent that Paul would have expected his readers to understand just what he was alluding to. We need to think outside the box and consider that New Testament writings were often amended after they had been written.
It appears that 1 Thessalonians 2:14-16 is widely regarded as an interpolation - see for example, An Introduction to the New Testament, pp 166, 463, by Raymond E. Brown. Its polemic against the Jews is quite at odds with Paul's usual treatment of the Jews and the fact that he, himself, was a proud Jew. It is consistent with late first-century condemnation of the Jews. The wrath of God is considered an unmistakeable allusion to the destruction of the Temple in Jerusalem in 70 CE, and the death of so many at Roman hands.