The following is from the website Dictionary.com :
par·a·noi·a [par-uh-noi-uh], noun
1. Psychiatry. a mental disorder characterized by systematized delusions and the projection of personal conflicts, which  are ascribed to the supposed hostility of others, sometimes progressing to disturbances of consciousness and aggressive acts believed to be performed in self-defense or as a mission. 2.baseless or excessive suspicion of the motives of others. Also, par·a·noe·a [par-uh-nee-uh]. Origin: 1805–15; < Neo-Latin < Greek paránoia madness. See para- , nous , -ia 
Here’s something else that the editors might have added to the above definition:
3. The characteristic of being so absurdly and maniacally obsessed with a single public policy issue that one deludes oneself into believing that every other policy matter pales in importance and, indeed, that advocacy surrounding all other matters is really part of a conspiracy to target one’s issue. 4. The belief that millions of good people should suffer in the shadows so that it can be assured that a few thousand souls can purchase and own mass killing machines without meaningful regulation. See for example: The American gun lobby.
If you think this is an exaggeration, check out the following news item:
The national pro-gun advocacy group Gun Owners of America issued an alert  last week (forwarded this week by the group Grassroots North Carolina ) in which it said (among other things) the following:
“The House Republican leadership will soon announce a set of ‘principles’ for immigration reform. Supposedly, if these ‘principles’ are not well-received, the House will shelve the issue for the remainder of the year.
To be blunt: The health of the Second Amendment relies on demolishing these ‘principles.’
Immigration reform will add over 8,000,000 anti-gun voters to the voting rolls. There may be as many as 11.5 million persons illegally in the United States. And, a Pew poll from last year indicated that if illegal immigrants were given citizenship, they would vote for liberal, anti-gun candidates by an 8-to-1 margin….
The first reality is this: If the House passes ANYTHING, the Senate will tack on its amnesty bill and send it to conference. And the national conversation will turn off of ObamaCare and onto immigration.
And guess what? Every gun-hating institution which moved heaven and earth to pass gun control will move heaven and earth to get the House to retreat — if not to a ‘pathway to citizenship,’ to a ‘pathway to legalization.’
They will have created the biggest and most motivated Obama-loving movement in the country — devoted to electing anti-gun politicians and retaining Harry Reid’s control of the Senate.
Heaven help us.