from wikipedia:
(MS-13) is often public in its violence. Infanticide and femicide are common, with El Salvador hosting the third-highest femicide rate in the world. In 2016, one in 5,000 Salvadoran women were killed. Legal impunity is a key factor. In femicide cases, only 5% result in convictions. Violent retributions target enemy gangs as well as rival gang members' entire families, friends, and neighbors. Occupied passenger buses are sometimes burned. Police officers, government officials, and community organizations are frequent targets.
New York District Attorney Madeline Singas, referring to crimes committed by MS-13 gang members, stated: "The crimes that we're talking about are brutal. Their weapon of choice is a machete. We end up seeing people with injuries that I've never seen before. You know, limbs hacked off. And that's what the bodies look like that we're recovering. So they're brutal."
so, yeah - keep supporting them.
sometimes there are no good guys in a fight.