Sure you can find europeans who are concerned about Nord Stream just as you can find europeans who are against the use of Chinese technology. The question is who gets to decide? Us or the americans.
It's not "us vs the americans", it's us vs the Americans vs the Russians. And I'd say that our best bet is to choose the Americans over the Russians, as history has proved us that that was the best available choice for Europe in the last 100 years or so.
There are some Europeans who would prefer we chose the Russians (including a recent German chancellor who is now employed by Gazprom), I think that that would be a disastrous option. Going at it alone is also not a very good decision, as proven by the fact that the mighty French and British were not even capable of bombing almost defenseless Libya all by themselves, they needed the help os US tanker aircrafts.
The problem that EU international politics has been boiling down to two options so far:
1) (Reluctantly) do what U.S. tells.
2) (Eagerly) subvert to whoever offers a good deal.
I'd really love EU having a consistent stance on human rights, democracy, international law and free trade worldwide, and there are even some steps in that direction (like European army project), but until we're not there, I'd rather prefer option 1) to being corrupted by Chinese or Russian regime.
