In light of recent events in Amona, I thought the following story is apropos:
During the period when the chareidi public was protesting against cars that were driving through chareidi neighborhoods on shabbat, it became known that members of the leftist "HaShomer HaTzair" movement (who were graduates of military combat units), had intentions to go up to Yerushalaim and beat those who were protesting the Shabbat desecrations. In response to this, students of the Merkaz HaRav yeshiva started organizing forces in order to physically block the leftists from entering the city. Rav Zvi Yehuda Kook Zt"l fully supported this effort. One of the students questioned the wisdom of such organization since it will not be seen in a good light by the wider public. Rav Zvi Yehuda answered:
וכי אנחנו בגלות, שכשמכים יהודי הוא צריך להתכופף?
Are we in the exile that when they beat a Jew he must submit?