In the context of saying they are struggling with numbers ...
Despite it being clear in the article that crime had declined 20%
she mentions feuds being brought over, as Rhiannon quoted ...
Nope she said that 'that ongoing feuds
can also be brought into the country' - not that they were, but could be.
... that she then specifies a specific case doesn't break the context that ongoing feuds have an impact.
Which she fails to indicate was anything to do with a pre-existing feud.
It can certainly be read to imply Rhiannon's statement.
Indeed would be for those with a confirmation bias that migration is fuelling a crime spree.
Alternative, and more balanced, interpretations are available. Specifically that although there has been significant migration into the area there is no evidence of an increase in crime, indeed that crime has dropped considerably. That the influx of people speaking a variety of languages does create challenges when those people are either accused of crime, or are victims of crime. However given that crime rates are declining and funding has increased 20% that there should be significant capacity to be able to cope. Finally that there are tensions, but the implication is that the migrants are more likely to be the victims when those tensions break out into incidents, rather than the perpetrators.
A more cynical interpretation would be that here is a senior and ambitious police officer pushing for more funding for her force.