Specific right, no, but it arguably falls under the first amendment. Still though, if she's gonna throw shit, people have just as much of a right to throw it back. 

$3000 bounty and death threats kind of show the opposite of acceptibility. Maybe people shouldn't do stupid things.

Plus, you may want to look at the Flag Protection act of 1989

https://www.congress.gov/bill/101st-congress/house-bill/2978

It's not okay to piss on a flag, though people get away with it because they spout out freedom of expression. It's still illegal though whether they get punished or not.

That law is unconstitutional, and the constitution, though it is not flawless, is much more important than a flag. It has even been ruled to be unconstitutional by the Supreme Court, so unless you actually amend the constitution, it will still be allowed, as per the constitution.

There are nutjobs everywhere, and some people react completely out of proportion, with both death threats or asking for deportation, but I do not believe those people constitute a majority of American people. Hence why the woman is both alive and hasn't been deported.

It passed, it is law.

Doesn't matter if it passed. We still got tons of laws in the books (such as blue laws or Sunday laws) which are unenforceable.

In Louisiana, police tried to arrest a gay couple because of a sodomy law that is still in place. However, the District Attorney refused to charge the men, because the laws were found unconstitutional 10 years prior by the highest court in our nation, the Supreme Court.

Same with the Flag Protection Act. In 1990, it was deemed unconstitutional by the Supreme Court. When a law is struck down by this court, even if it's in the books (again, like so many outdated blue laws that still exist), they are unenforceable. It's not that people won't enforce it, it's that they can't. All a lawyer has to do is cite precedence stating that the Supreme Court deemed it unconstitutional (specifically referencing United States v. Eichmann) and poof, issue is resolved. Police won't try to arrest someone for this, but even if they did, a lawyer isn't needed to defend the defendant, because the DA won't charge that person since it is their duty to uphold the constitution.

https://en.wikipedia.org/wiki/United_States_v._Eichman

I'm opposed to the bastardization of the freedom of expression. 

What? The very purpose of freedom of expression is to have the right to insult people without being punished for it.

Death threats are definitely extreme for what she did, but she knew damn well what kind of attention she was gonna receive by making that post, on Independence Day no less. This is yet another example of how pathetic extremist are; they take their action, seeking out hate, and then cry victim when they get it. Just a shitty tactic people use to make the opposing side look bad. I mean what else can she do? She probably couldn't win an argument with a second grader by legitimate means. Like I said, people are being way too aggressive over this, but for her: don't poke the hornet's nest and then cry like a little bitch when you get stung.

So you oppose freedom of speech then? Or what do you mean when you say she should face to consequences for expressing her views?