That would be good for a change. Both the victims and the perpetrators are long gone. I remember when the whole town stood in a rare show of unity when the administration of a mosque was about to level the site of an ancient Crusader church to use as a parking lot. The site was excavated since then and a nice fence was installed to protect it. At present, the mosque and the ruins of the church stand beautifully side by side.
Time erases everything.
Given the time scale elapsed since the Crusades, an apology can only serve to clean the conscience of the West and to help propel it to higher moral grounds. As a probable descendent of the victims of the Crusaders, I do not care at all for that. If an apology has to be given, it should be given for what the West is doing now, in Palestine and in Iraq. The crimes committed now are evidently on the same scale and nature as those committed by the Crusaders and have victims who are presently alive. But before we ask for apologies from any direction, I strongly believe that we must give ours to our own victims.