You don't. Invaders implies armed occupying forces causing harm. "Invaders" is a more clear identifier than "gangster", given some gangsters may only sell drugs, not carry guns or use them to inflict direct harm.
Of course one could argue selling drugs is causing harm, but choice of ingestion of the drug is a distinct and challenging topic in and of its own. Also, the two can't be conflated (well) and the origin of the story was Facebook doing X, where X isn't equal to drugs.
I'm also thinking that enforcement against selling drugs is a governmental view, not a societal view. So, a group representing the larger group thinks "drugs are bad", whereas the larger group doesn't hold that consensus based view. It's the group speaking for the larger group holding that view.
In the case of Facebook's action, Facebook is deciding whether or not the larger group can use certain terminology, or not. Facebook is not deciding whether to address the "occupying forces" themselves, through direct action, like a government would do for the larger group.
Maybe Facebook is like a bunch of Mexican gangsters, though!
"Occupying forces" is equivalent to forces whose objective is to replace the current governmental system with their own rule of law. Given Mexican gangsters aren't replacing the governmental systems in these areas, this remains compatible with the assertion that "death to Mexican gangsters" lacks the proper identifying keywords to be allowed on platforms with rules against hate speech.
Just because some people (a subset of a given group and their consensus on topics) think Mexican gangster are occupying forces, doesn't actually make them occupying forces. It just means those people are incorrect in their assumptions about what is true, or not, as viewed by the governing group, in a given area.
Of course one could argue selling drugs is causing harm, but choice of ingestion of the drug is a distinct and challenging topic in and of its own. Also, the two can't be conflated (well) and the origin of the story was Facebook doing X, where X isn't equal to drugs.
I'm also thinking that enforcement against selling drugs is a governmental view, not a societal view. So, a group representing the larger group thinks "drugs are bad", whereas the larger group doesn't hold that consensus based view. It's the group speaking for the larger group holding that view.
In the case of Facebook's action, Facebook is deciding whether or not the larger group can use certain terminology, or not. Facebook is not deciding whether to address the "occupying forces" themselves, through direct action, like a government would do for the larger group.
Maybe Facebook is like a bunch of Mexican gangsters, though!