> The US isn't the only potential ally against Chinese influence, why should Europe align itself with America instead of other countries?

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.