"If it did give rise to just a slight predisposition, then only a tiny minority would succumb.
And that is exactly what is found."

This doesn't help your case.

It suggests that if a small minority of a community commit a crime, that therefore that whole community has a slight predisposition to commit that crime.

In fact, the fact that it is such a tiny minority shows that they are the exception to a wholly different rule.

And there is still nothing to suggest that that tiny minority were influenced by "their culture"" as opposed to other manifold possible influences.

And that is all assuming that British Pakistani culture can be identified and defined that easily.

Supporting your argument is like trying to carry water in a seive.