On the ground, it’s bombs, bullets and blood. On the Web, it’s a war of ideas. As Al Jazeera, via Twitter, stokes sympathies and outrage over Israeli force, the Israeli government fires back with information campaigns of its own on Facebook and YouTube.

At the end of January, Egyptian midfielder Mohamed Aboutrika was the talk of the soccer world. Scoring the winning goal to defeat Sudan’s team, Aboutrika raised his shirt to reveal a message of Palestinian sympathy.

It read: Sympathize with Gaza.