Handled badly by both. If no vis app at night for them fine. It was communicated as such. ATC were less than accommodating by sending them to the hold. By that time both parties had become entrenched and then the crew threatened them with an an emergency call if ..... and what sounded like " and that will really **** up your...". To which ATC became more entrenched and invited them to call for a divert or shut up. All LH had to do was say "minimum fuel". To which ATC would be obliged to ask them for fuel remaining in minutes. Some sort of expedited sequencing should have then followed. Drama over. A few big egos on the radio here.