You could've read a bit more of the article. Proximate cause != ultimate cause.
> Initial limited but constructive government actions to alleviate famine distress were ended by a new Whig administration in London, which pursued a laissez-faire economic doctrine, but also because some assumed that the famine was divine judgement or that the Irish lacked moral character,[20
> Initial limited but constructive government actions to alleviate famine distress were ended by a new Whig administration in London, which pursued a laissez-faire economic doctrine, but also because some assumed that the famine was divine judgement or that the Irish lacked moral character,[20