Because you ignore all the other possible hypotheses that do not centre around culture.

And be clear, you have suggested a hypothesis which blames Pakistani culture for these crimes, without exploring other hypotheses.

If you are going to make such a claim then you need to provide a damn sound and well supported argument.

relying on generalizations and stereotypes, and drawing wildly unconnected conclusions about these criminals based on extremely narrowly selected criteria does not produce an accurate picture of what is happening, but merely a slightly more developed wild hypothesis.

Wilfully pushging a hypothesis that depends on blaming Pakistani culture, without exploring other options indicates a DESIRE to blame Pakistani culture to begin with.