That doesn't make sense since the US defense industrial base is extremely reliant on sales to partner nations in the EU. Without those sales the base will contract even further.
EDIT: Like Europe can be more able to defend itself while still being able to sell US made weapons to Europeans, but Trumps strategy is to make Europe more self-sufficient while also cutting the US out of their defense purchases and decision making process. That doesn't make the US stronger, it clearly weakens its position.
Soo you're saying that Trump is not playing 5D chess
Playing Devils advocate here, let's say there is more than meets the eye.
1. Some social media posters indicated that Trump wants a recession because a ton of Treasury notes are expiring this year and if the interest rate decreases, they can refinance with lower payments. Its actually quite interesting seeing the echo chamber promoting this type of news.
2. In all honesty, Trump and his people probably calculated that no matter how much shit on EU and Canada, these countries will not cost up with china anytime soon, so they have a lot of wiggle room. Unless the media environment changes on those countries, I'm afraid it's still taboo to work with china. I mean China would also be cautious. If china improves relations with EU and Canada, in 4 years when another president comes along, those counties would revert back to having US's good graces. They may choose to drop any act of improving relations with China.
3. Sure the EU and Canada are complaining about not buying US arms, but has any one of those countries acctually canceled the F35 contract or is it all lip service. I'd love to see EU and Canada not buy from the US but I'll believe it when I see the contracts being cancelled.
4. Now you're Canadian just like many here. Right now Canadians have a disdain for the current govt with Trump, but in 4 years, if a more cooperative president then takes the helm, how many Canadian will still hold a grudge? Many right now are boycotting the US but only for the duration of Trump's rule, not forever.
So game theory suggests that Trump can likely be even more brutish against the EU and Canada for a while longer, with minimal costs in the short term.