I don't think you understand the issue here. Taxing everyone in order to fund the arts is fine, unless you are a philistine. But this isn't that. It's taxing selectively foreign goods that their people are buying. One consequence will to make those products slightly less competitive. That is protectionism of a sort.
To quote the original Reuters article:
So, it is just the opposite of selectively taxing foreign goods. It is about ending an exemption. And it is not unique in any way. E.g. Germany has been asking computer and smartphone users to pay public TV fees for these devices for years (approx. $218 per annum), for the sole reason that public TV content was accessible through the Internet (wether you actually accessed it or not).
"Protectionism" per definition would require local goods to be made more competitive than local products. This is not the case here. EU law would not allow consumption taxes on only US, or non-French, tablets. It will either affect all devices of this type, or none of them.