It was pointed out to me once by Leibel [the son of the Rosh Yeshiva of the Mir Rav Shmuel Berenbaum] that there is an obligation of "מחאה" (to object to wrong doing--even when it seems you will not be listened to.]
In fact you see that in the Gemara in the events about Kamza and Bar Kamza. There was some wrong act that was done. But that act was not the cause of the fate of the Temple to be destroyed. Rather the fact that the sages of the time did not object to that act.
You see this also in the Old Testament with the tribe of Benjamin that did not object to the treatment of the concubine at Giva. And in that case God himself revealed to Israel to continue wiping out that tribe because of the fact that they did not object to wrong doing.
Similarly you can see why the Gra would have signed the letter of excommunication. Same reason. To object to evil--even if you know you will not be listened to.
In fact you see that in the Gemara in the events about Kamza and Bar Kamza. There was some wrong act that was done. But that act was not the cause of the fate of the Temple to be destroyed. Rather the fact that the sages of the time did not object to that act.
You see this also in the Old Testament with the tribe of Benjamin that did not object to the treatment of the concubine at Giva. And in that case God himself revealed to Israel to continue wiping out that tribe because of the fact that they did not object to wrong doing.
Similarly you can see why the Gra would have signed the letter of excommunication. Same reason. To object to evil--even if you know you will not be listened to.
