Politicians and Sympathy???
claiming their loved one would have been alive but for the politician's decision to stop law enforcement snooping.
Perhaps, but it a lot of recent terror cases, it's usually quickly revealed that the guilty party was already known to the system (through snooping or merely sticking up like a sore thumb) but no action was taken.
Person was able to do it anyway because lone nuts often don't need to communicated with anyone else in order to go nuts (I presume all the voices or at least negative dialogue goes in (for now at least) the privacy of their own heads).