While walking through the Muslim Quarter of Jerusalem’s Old City earlier this year, I noticed posters in the window of a sweets shop. I wondered how many tourists would understand what the posters are.

As is popular in Palestinian culture, the posters are depictions of the “shaheeds,” or martyrs—those who blow themselves up in a bid to kill Jews.

Does this cultural predilection bother anyone in the world? Does it bother the UN? Does it bother the International Solidarity Movement? Does it bother American Christians who support the Palestinians?

A culture of murder and death should not be met with yawns or disinterest. There is in fact an opposite reaction, such as the so-called divestment campaign, in which Palestinian supporters refuse to buy goods from “occupied territory,” products made by Israelis.

That reaction is a two-way street.

I bought nothing from the shop owner who glorifies the murder of Jews.

To refer to Israel’s establishment—and continued existence(!)—as “Nakba,” or, catastrophe is one thing.

To sanction murder is quite another.