The fight certainly isn't over, to be sure, but most Americans have some degree of freedom to own guns, carry guns, and protect themselves with guns.
By contrast, the situation in Europe tends to be grim. Many nations strictly limit the freedom of people to keep and bear arms. As you might expect, the "sensible Swiss" are an exception, and nations such as Monaco, Austria, and the Nordics are semi-reasonable.
But it's just about impossible to own a gun in countries such as the United Kingdom, France, Germany, and Italy. Even groups that are targeted by Islamic fanatics, such as Jews, aren't allowed to defend themselves.
And that is good news for terrorists. They can plot murder and mayhem with considerable confidence that they won't meet armed resistance until police show up (just as mass killers in the USA seek out gun-free zones for their evil attacks).
But that passive approach may be changing in some European nations.
Czech Your Self-Defense
According to a column in the Washington Post, the President of the Czech Republic believes an armed citizenry is a safe citizenry.