What do a singing competition, Gaza, misleading video and Pierson have in common? This tweet. The singing competition indirectly helped spark a deadly round of violence along the border between Israel and Hamas-controlled Gaza between May 4 and May 5.

Katrina Pierson, a senior adviser to the Trump campaign, tagged prominent Democrats, including Rep. Ilhan Omar (D-Minn.), in a Twitter thread. She questioned whether or not Omar would condemn the violence along the Gaza border.

Pierson included a video showing rockets firing into the sky as part of the thread. And almost immediately Twitter users and Omar responded, noting the video Pierson had shared wasn’t from Gaza at all. So, what’s going on here? Let’s dig in (and don’t miss our video above).