From what I can tell about the trademark owner in this case, they make logistics software for shipping. I fail to see how a consumer could confuse that with an HTML template engine.
It's past time to recognize that 'software' is way too broad a category for a single trademark. As 'software eats the world' and more and more industries are automated, we need to break that down into more granular categories.
This is obviously an issue when searching for JADE tutorials or hiring JADE programming experts for instance.
This legal threat is solely because Jade, the trademark holder, is losing the popularity contest with Jade, the open source library. They're trying to buy their way to the top of Google search results with lawyers.
Seems pretty likely to cause confusion.