smerel> Today a similar speech on July 4th from a major gadol would be unthinkable.
Maybe you can just post R Moshe’s words. They should be operative unless later poskim contradict it explicitly, I think – and it is not out of question .. for example, praises of Germany by some Yakki gedolim did not age well. Look at R Shimon b Yochai who refused to “celebrate” any of Roman achievements, while his son, R Eliezer found it possible to work as a detective for the Romans.