Jews in the Persian Empire faced genocide instigated by the chief minister to Emperor Xerxes (born about 519 B.C.E. and died in 465 B.C.E.). On finding out they were to be murdered, the Jews at once prayed intensively for Divine help. Their prayers were heard: Xerxes learned his chief minister had betrayed him, and so decreed that Jews should defend themselves if they were attacked. The Jews killed some 30,000 of their attackers, and so saved themselves (see the Book of Esther). Each year, Jews celebrate on Purim - a holiday that usually occurs in March - to commemorate this deliverance.
The above synopsis is from http://www.gunownersalliance.com/Rabbi_0029.htm. Take a moment to think about Purim, about the ability to defend yourself as an unalienable right in the Bill of Rights. The Jews needed the permission of the government to defend themselves. We do not need that permission in the USA. The Torah and Talmud give examples of defending yourself as a mitzvah.
When I learned about the Holocaust at Hebrew School, I kept wondering how the Jews couldn’t see what was coming. I guess they didn’t have 20-20 hindsight. I do not know what is in store for Jews, let alone the USA over the next 10 or 20 years. I have put myself in debt to get educated in the hopes that the times I live in will be peaceful and I can make a living as a physician, but I am also becoming increasingly prepared for tougher times.