First link refers to open carry protesters "harassing" a guy, but if you look at the video it seems that the protesters themselves did nothing more than follow a guy for a short distance while (arguably) being rude to him. This is a perfectly legal course of action and does not amount to threatening or intimidating activity.
Second link has people exercising Second Amendment rights and First Amendment rights at the same time. Charges have been filed, but we'll see how they play out in a court of law. In any case, this may be more like racists openly carrying, than open carry people being racist. You might as well post up a video of Craig Cobb doing what he does.
Third link refers to a counter protest. For fuck's sakes, if you want to remove from people what they consider to be their rights, you may well get some of them to protest against you. I don't support the crass comments referred to in the article, but does this amount to intimidation or threats? No, and if you disagree with me, I recommend that you inform local law enforcement about them. Remember, the First Amendment is very permissive, you can make sexual comments about people and fantasize about their deaths and stuff,
(which is why Mike Malloy is still on the air). About the only thing you can't do is make serious threats against people, which apparently law enforcement doesn't think has happened.
And if you think people on the other side of the issue don't threaten people, you're mistaken. The most obvious, undeniable, and widespread example of anti-gunners being threatening and violent is by proxy: when they use police, and the criminal justice system, to threaten or perform severe violence against people who disagree with them about what guns are appropriate to own, or about where it's appropriate to carry them. Let us say that I decide to buy a rifle or something without going through the applicable licensing procedure, and the cops happen to find out about it. I may then be subjected to a search of my home, not to mention being taken to jail or prison against my will. That's orders of magnitude more violent than a few nasty comments on Facebook, or even an armed counter protest.