"Howard-Browne, who was arrested on March 30 after being accused of presiding over two services attended by hundreds of parishioners, is himself something of an outlier as most houses of worship have closed their doors in the interests of public health."

For all the panic, realize that outliers have minimal effect on the global statistics.
So yes they are violating the law.
And yes they are putting themselves and others at risk.

But no, their behaiviour, being outliers, will not affect the course of the pandemic.

Shitty thing for them to do but then again outliers are everywhere and for many reasons and not a reason to panic or wish them ill-will.