Now that we are in the time of the three weeks, mourning for the destruction of the Beit Hamikdash, we must take time to feel inwardly the destruction of our own inner beit hamikdash…our own inner kedusha. We must do our utmost to rebuild our inner sanctuary and to learn about rebuilding the Beit Hamikdash (through learning the hilchos Beis Habechira of the Rambam) as Hashem says He considers it as if we rebuilt the Mikdash when we learn those laws…it is a time of reflection and inner growth and spirituality. 
It is time for the Jewish leaders and all the Jewish people to stand up and say the truth to the world: the land of Israel belongs to the Jewish people because G-d gave us that land. 
here is a beautiful video to understand this concept fully and to know how to deal with the nations of the world who oppose Israel and want to claim we are "occupiers".