I am not going to confuse Islam with terrorism. The latter is done in their name by a small minority of "extreme" factions within it.
So the WTS and Islam? Truth is that in recent years they have held from denouncing anyone by name - pretty much. The old days of what my wife calls " Good old clergy-bashing" have given way to a more positive simple message of good things if you follow them....
In the days when they did slam Christendom, Islam was simply not an issue. That was "over there" in the land where they hardly had a presence. It did not impact on them or their readership.