Good question Carlita, and I would like to add a little to the discussion already taken place.
I think the answer to your question may find its roots in the past: through Islam, Nationalism, and Christianity.
When radical Islamist advocated killing Jews and Christians, many Muslims were quiet because they were thought of as "fellow Muslims" which had "isolated views" which would never permeate or reverberate through the Islamic family. The result? Without opposition the seed began to sprout and grow, and the world suffers for it now. Today we see radical Muslims preaching that God requires them to destroy anyone who opposes their particular brand of Islam.
Likewise in Germany, when the Nazis expounded German pride and nationalism at the expense of Catholics, Jews and Gypsies, few spoke ill of them, because they identified the Nazis as "fellow Germans". Nazism was watered and planted, and because few spoke ill, allowed to flourish and grow. If you didn't agree with their version of the German ideal, you were ridiculed and later sent off to the camps.
In some corners of "Christianity" (and I'm using this term in the absolute broadest possible sense), we see the same happening now. The Westboro Baptist Church has children carrying signs advising God hates America and wants to kill homosexuals.
At the Kingdom Halls of Jehovah Witnesses, their children are taught that God hates "Christendom", America and any church or government that doesn't immediately adopt their particular brand of Christianity.
(Note the cross on the burning church).
Radical Islam teaches that America is the great Satan while Jehovah Witnesses teach America is controlled by Satan. Islam teaches they must destroy "Christianity" through a perversion of the Koran while Witnesses teach God will destroy "Christendom" through a perversion of the bible and both groups believe the earth will become a paradise once the offending groups are eliminated.
I have been in many traditional Christian churches and even a few synagogues but I have yet to be handed a leaflet or flyer that has a picture of a burning mosque, synagogue, or Kingdom Hall. I simply cannot say the same for the Watchtower.
The problem is that for some, the only version of scripture is the one they have been taught at their places of worship, so we can be silent and allow these "truths" to stay unchallenged, or we can speak up and engage those who would have us negatively brandish others. The best way to do this is with dialogue and openly challenging their ideology. It amazes me that groups who suffer bigotry and persecution (as the JW's did under Nazism) can be so willing to engage in such bigotry now.
Here we have an image of a priest with a bible in one hand and a gun in the other (
Awake! 2011). Regardless of my differences with Catholics, I could not be party to a community that endorsed the distribution of such disturbing images in my neighborhood, nor could I be silent about any group that had:
I think most folks would take ill of attacking Witnesses personally, as would I and the forum moderators, but their doctrines and teachings are fair game, especially on a religious discussion forum. Witnesses, like most folk, are honest, pleasant, and peaceful, but its like having the nice granddad who can't seem to stop going into a bigoted rampage every time the grand kids bring somebody a little different by the house.