This letter to the editor was published in the Miami Daily News on 28 April 1939. I take it from the Google News run of the newspaper.
Hitler had just delivered one of his most effective speeches, one that attacked Roosevelt at length. The letter writer expresses a considerable lack of enthusiasm for FDR, and of course he was not alone. The isolationists were still strong enough to frustrate FDR’s attempts to oppose Hitler more directly.
The newspaper’s editorial on the same page finds that Hitler had made out “surprisingly well” in his response to FDR.