[tlhIngan Hol] how is the {mapIm ngIq maH} correct ?

[mayqel qunen'oS]

Read the following non-Ca'Non sentence from dsc:

dsc "Battle at the Binary Stars"
> {mapIm ngIq maH 'e' luQaw'meH ghoS chaH}
> They come to destroy our individuality.

I know that this sentence is non-Ca'Non, but there's something I wonder..

Isn't the {ngIq maH} third person ? So, how can we have the {ma-} on the {pIm} ?

Doesn't this violate the accord rule, or however the @!#! you call it,
when the verb prefix doesn't agree with its' subject ?

~ bara'qa'