If war were to have been declared and they want to try to come here then no its not a terrorist plot. The act may strike terror. But the fact that it occurred under decleration of war changes the way it is viewed. So far there has been no army in this war on terror. If they wish to put a uniform on and declare themselves then it would end in a few weeks. Big difference.
What is the opinion of the muslim community as far as decrying the extremists for who they are and helping to turn them in ? Im asking because you mentioned you were muslim and Im assuming you practice your faith. So you might have an idea of what is really going on in your own words and opinion.