As the leader of the Catholic church in the 21st century, it is quite normal that he speaks against war.
If the Gazans or the Israelis think that the Pope will defend their military tactics, they are deluded. Although the history of the Catholic church, in these last two millenniums, has at times been deeply entrenched in war economies, it seems politically in line that today, the Pope speaks out against war as do most pacifist.
Ask the Lebanese Catholics what they think of the Hizzybilly tactics.