Imports of liquefied natural gas into Asia last month slumped to the lowest in seven years. The reason, of course, was the war in the Middle East that has choked off about a quarter of global LNG supply, pushing prices higher and spurring a race for limited volumes. Most of those volumes are coming from the United States. Yet a future LNG boom is far from certain. Earlier this week, Emirati ADNOC said it would invest billions in the U.S. natural gas industry, including production, midstream, and liquefaction, as well as regasification in receiving…