How pointless, biased and inflammatory. Generally, citizens commit crimes at rates higher than immigrants. Please keep that in mind while you read the Daily Mail or whatever tabloid you get your information from.
It's not really valid English parsing to read it that way - if the poster meant it that way then they've accidentally formed the sentence in a way that's unambiguously not ironic. Putting the word refugees in quotes makes it biased and inflammatory, accusing people seeking asylum of being rapists and murders.
If the whole phrase following the word probably was in quotes, only then could it be read ironically.