Cremation and The Holocaust

In your column of Dec 31st, you explained the importance of burial vs cremation, with respect to the Jewish belief in the Revival of the Dead, the final reward when the body is reunited with the soul, something which may be lost on one who forfeits the body to cremation.
Unfortunately, there are so many of us eternally mourning all the victims of the Nazis, whose bodies were cremated en mass by no choice of their own. How does Judaism deal with those martyrs who never had a choice with respect to the final reward you discussed?