The US isn't the only potential ally against Chinese influence, why should Europe align itself with America instead of other countries?
Also, do you think there's no argument to be made for changing China's behaviour through a partnership?
Of course! All countries that value a rules-based order should ally, and that would include the EU, the US, India, Australia, and the many other smaller countries.
> Also, do you think there's no argument to be made for changing China's behaviour through a partnership?
Been tried. India was trying that by letting China have a stake in the economy. It hasn't ummmm worked out so well.
China uses the economy as a tool for its own political aims.