TIL LU is not French but part of Mondelez since 2012

This is part of a more systemic issue.

In general, American capital has been buying up European assets for the past 20 years at a large scale.

Because of the way we (EU) prioritize workers, society and customers and they (US) prioritize shareholders and capital, their companies are always in a better position to take over our companies.

We need to protect our European companies in the same way China and Japan protect their companies.

You're really oversimplifying this situation, European multinationals do the exact same thing to US brands. Examples include Nestle, Unilever, and AB InBev, among many others.

Multinational corporations make a boycott of a specific country's products difficult, because oftentimes the factories that make the products may be within your country even if the top of the chain is located somewhere else.
- No, you are attacking a straw man.
  
  Of course it's not black and white, but the overall balance is much more towards American capital than European capital.
  
  Even for a company like Unilever, American institutional investors hold a much larger share than European investors hold in Mondelez.
  
  That's the point I was making.

Cadbury is also owned by Mondelez, so many British chocolate bars are out too.

And Cadburys have reduced the quality of their chocolate since the take over, to maximise profits further. I largely try to avoid them along with Nestle, but that mostly leaves you with store own brands & the more expensive but much better quality smaller brands (until they get bought out & ruined in the process!).

The factories are still in France though

LU France is a company in the Biscuits division of the American group Mondelez International (formerly Kraft Foods), acquired by the Danone group in 2007. The LU brand, whether under the Danone or Kraft Foods brand, is the number one biscuit manufacturer in France. It is also the number one in Europe for dry, sweet, and savory biscuits. Since its incorporation into the Kraft Foods group, the company has become the world leader.

The company consists of:

9 production plants: Besançon, Cestas, Charleville-Mézières, Château-Thierry, Granville, Jussy, La Haie-Fouassière, Toulouse, and Vervins;
2 central warehouses;
2 headquarters in Rungis and Vélizy.

https://fr.wikipedia.org/wiki/LU_(biscuiterie)

Interesting! Well, it's kind of a tough case. If anyone here knows someone who works for LU, how has things changed since they belong to Mondelez? Maybe there is a difference, but it's not like Kraft or Danone are pop and mom stores
- Mondelez is the former snack-food branch of Kraft food. They renamed it and it went an independent company.
  
  Kraft Group stayed for the grocery branch. Eventually, Kraft Group and Heinz merged into Heinz Kraft later.
  
  If they was a change, it would be between Danone and Kraft. It's not the same management culture.
Most global American food companies have food plants around the globe.
- Most global ~~American~~ food companies have food plants around the globe.