This "vaguely nationalistic world view around tech" is a direct consequence of the US government weaponizing its leading tech firms reach into the EU for nationalistic purposes.
The EU was build on the principles of collaboration, to overcome the nationalistic impulses. Free trade and free movement of people, no need for everyone to replicate what everyone else is doing. Preventing individual nation states from favoring and supporting their home grown firms over other EU firms is a central legal principle.
But this only works if it is reciprocal. And ideally if the partners are roughly on the same level. When you force developing nations in trade deals to not protect local firms, you are also preventing them from moving up the value chain and locking them into the position of "raw material providers".
When trading with China we know that China has absolutely no qualms supporting its strategic industries with a truck load of subsidies. And it is preventing foreign firms from investing and selling on the domestic market.
For the longest time the US was considered a safe partner though. Sure, plenty of disagreements in the details, but in principle someone whom you can rely on. That idea has been decisevly dismantled over the last 10ish years. The US unilaterally cut of the EMails of EU courts. The US has unilaterally decided that EU partners cannot use Fable/Mythos.
The only reasonable reaction is to make sure that the EU can maintain and create its own critical infrastructure.