Modern jihadism started in the 1990s at the earliest. Jihadism conceptually probably started somewhere around the Sudan Conflict in the 1800s. What are you referring to with 100 years ago?
There's no evidence to back this up.
Turns out that Rotherham council had very little to do with Islamic apology, and instead more to do with poor information sharing and multiagency work - specifically that the CSE team in the area carried really stupid case loads where they couldn't possibly have given any of them proper attention.
I don't know how Rotherham has been tied to Islamic apology; the problem was that the perpetrators were Asian and the council didn't want to inflame racial tensions, not that they were Islamic. Their religions were never brought into it.
And no, I don't believe that thinking that a religion of 2 billion people should be unilaterally condemned makes me somebody who would overlook child sexual abuse. I tend to like blaming people for their actions rather than concepts wherever possible. I'd like to blame Sunni jihadism, I can get behind that.