And the US has good reasons to do so.
The Brazilian worm the Obama Nungara is spreading rapidly across France, as some researchers say that it threatens biodiversity, and a new study is asking the public to send live worms to be studied.
www.connexionfrance.com
Five species of giant, predatory, hammerhead flatworms were identified for the first time as invasive species in France and French territories.
www.livescience.com
We have a lot of issues here in Europe thanks to our low standards. Invasive pests are becoming a real issue. We have Asian turtles running around here in the Netherlands, we have Russian snakes, African weeds that burn your skin, and the list can go on for a few pages. On one side I'm happy with that; I own jack pines, bristlecone pines, all sorts of junipers, ponderosa pines, and a tonne of other 'invasive' species.
As for diplomacy:
Bring an acorn, give it a political twist "We plant this seed together, so that together we can grow strong. The weather cannot break us, our branches will reach for the skies, our shade will give future generations a place to contemplate. It is a way of showing that nothing beautiful ever comes from nothing, you need to start somewhere, plant a seed and nourish it. This symbolizes our relationship together. We plant a seed here with a history of both our countries, to ensure we have a future together." The people love that kind of stuff.
That would have worked a lot better than ripping out and killing what you've just planted. But then again, the news around here tells me that Trump is doing that on a daily basis. That is a neutral statement by the way, an observation at most. I'm not going down this rabbit hole by venting an opinion.