In the US, we do have freedoms, many of them. What I find telling in terrorists - homegrown or not, is that they feel their rights extend to the point where they feel justified in terminating life. That life is not as important as their rights. Much of this is taught, some could be genetic as terror and hate between tribes/clans/etc has spanned centuries and cultures.
In the US we often discuss rights and how far one's rights are extended before they trample the rights of some one else. And I wonder at what point do we "DO Something" about that action. Is it when the person "has" the thought? Or do we wait for him/her to "act" on that thought? If we wait for the act, how can we then blame the law enforcement for too much force, not enough force, not quick enough or too quick in his actions to subdue the "act'?
I would posit that my rights, as likely you feel the same, are just or righteous - right up to the point of me striking out at someone. I can speak, even loudly, at will and should be protected by the bill of rights of the USA. But the moment I strike out.....I need to learn control. Whether I make contact or not, I have exceeded my rights and I am no longer just. Similarly, when someone strikes me, I have the right to defend myself until such time that the conflict could be adjudicated. Death of either conflicted party, accidental or otherwise should be dealt with severely (topic for a whole new day).
For the US system to work EVERYONE, citizens and immigrants, must respect that these rights are universal and available to all, with the full force of the USA behind them to protect everyone under the law. It is incumbent on newcomers as well as citizens to learn the laws, certainly these most basic premises the nation was created under. Should you choose to not participate, that is your right - but you may not be protected, nor can you plead your rights are superior to any one elses.