These are not 900 sex crime arrests. These are 900 arrests, 'including sex crimes'
Just read the corresponding article from another tabloid, The Sun:
https://www.thesun.co.uk/news/15287...g-of-offences-including-rape-and-child-abuse/
In London, 238 arrested included two for rape, three for death threats and seven for sex offences
So 9 / 238 = 3.7% of all Syrians arrested in London were due to sex crimes. So if we take the really low number of 900 nationwide arrests, we arrive at about 34 Syrians arrested for sex crimes last year. Still not a nice thing, but the OP is obviously based on an article that gives a wrong impression on purpose.
Also, I predict this post shall largely be ignored in the discussion in this thread.