asalamo alaikom
it is a very sad what is happen to our brothers and sisters, but at the end of the video there was a verse from the Quran in which it says
"and say not of those who are slain in the
way of Allah: "They are dead." Nay, they
are living, though ye perveive (it) not."
i believe part of what is happening to our brothers and sisters is our own wrong doing, not practicing our religion/deen as we should, and not holding firm to it.
i think what we can and should do is teach our self then teach the people around us the true religion.
islam inshaalah will always shine