Liberals are programmed to react to events with certain prescribed templates, most frequently those that are driven by victimhood. When the templates clash and members of a minority group become the victims of another minority group (particularly one that liberals are favoring at the moment), liberals are conflicted. The result is usually silence.
I remember Bob Grant's book from years ago about how the media handles this. He had a scorecard about what trumps what. I remember how accurate he was. White kills black= national scandal. Black kills white= local story, race not factor. Man kills wife= man bad. Woman kills man= man abusive, deserved it. Gay person murdered= society responsible because of homophobia. Gay rapes child= local story, sexual orientation not factor unless Catholic priest, then Catholic church responsible. Being gay trumps everything. Reggie White was demonized for being "anti-gay" despite being black. If these black victims were gay, THEN the race/immigration status of the perp would be reported fervently.