Probably never.
Islam (and particularly the various strains of Islam that do the bombings) gives tacit rewards to those who kill non-Moslems. You can argue over the exact translation and interpretation, but the Koran does indeed allow, even encourage, the murder of non-believers. And there is the much cited rewarding (72 virgins in paradise – again, subject to interpretation).
Because of these implicit and explicit encouragements, Islam has self-defined to be a religion that doesn’t care about life in THIS world, only in the next – and that is the basis of their practice of mass killing of others. You can argue that it’s not ALL Moslems, just some, but the fact remains . . .. that the Koran-motivated terrorist acts continue daily.
[Let’s be clear here = Islam is not alone here. The Talmud has some verses which espouse similar non-Jewish activity.]
The moslem difference is that there are active groups (palestinians, fatah, al qaeda, etc.) that have taken these Koranic verses and built a killing machine from it.
So why don’t other religions take on the moslems? Or at least copy their tactics? Largely because other religions tend to emphasize living for NOW, not exclusively for the orld after death.
Other judaeo-christian religions generally pay more heed to the “Do unto others” and “Thou shall not kill” tenets than do Islam.
My view is that for Judaism and Christianity to “fight back” would mean lowering themselves- diminishing themselves – to the level of militant Islam. And Judaism and Christianity are not going to do so because of their moral values.