Although I would prefer they weren't there, I'm not too worried about the tariffs....
My reasoning is fairly simple...
Producing countries such as Australia and Qatar can fill their boots selling to China to fulfil the growing demand without tariffs, whilst the USA can fill the orders from other countries such as Europe, South Korea, India, and South America.
Supply and demand will be basically unchanged, and globally the price of LNG will generally remain the same, it will simply follow different routes.
In reality, I think the tariffs are piss and wind, and by the time Magnolia is up and running the bun fight will be over. We might even still get BTA's with Chinese companies related to IDG and if the tariffs are still in place upon production they can just arrange swap contracts with other LNG purchasers.