I don't think this really signifies a meaningful deterioration - this has been happening forever. Its diplomacy by trade policy. The EU does the same to us, we do the same to Canada, Canada does the same to us. Usually the penalized industries are just propped up with subsidies in the targeted country anyway. If anything, trade wars were more vicious a century ago than they are now.

In most of these nations, the measures have strong support. You can't expect a Canadian farmer or French wine maker to put the concerns of Americans above their own economic interests. I highly doubt homegrown EU-tech companies were at all bothered by recent measures against US tech giants.