"You cannot invade the mainland United States. There would be a rifle behind each blade of grass." -Admiral Isoroku Yamamoto

Yamomoto was right.  His point is irrelevant to the problems America has with civilian-on-civilian gun deaths.  The future health of our country requires a better understanding of why there is so much gun violence in America.  I don't believe it is solely because there are so many guns.  I do believe it has much to do with the levels of selfishness, rage, inequality, and alienation among our population.

Don Carlos, you don't stop a tank with a rifle, at least not directly.  What you do is you take out the tank's supply line.  This includes the trucks carrying fuel (iirc, tanks burn 2-3 gallons of diesel fuel per hour, whether they're sitting still or running at 40 mph), the mechanics who service them, and (when possible) the drivers of the tanks (as Kurt Saxon once said, "They gotta get out and pee SOMETIME!").

The only time that you would attack a tank directly is when it has shut down for the night.  Official SOP (Standard Operating Procedure) for powered down tanks is to park themselves in the midst of the infantry, because when they are powered down, they are vulnerable.  Historically, though, tankers eventually park away from the infantry, because their skills usually qualify them for better/more food, smokes, etc.  In that situation, you can use thermite grenades to disable or destroy them.  Furthermore, if you have suppressed weapons, you can take out the tank crews as well.

The only other weapon that would be effective against a tank would be a flamethrower.  A flamethrower is essentially a canister of napalm under pressure.  There is a small pilot flame at the end of the hose, and using that hose you would have to coat the whole outside of the tank.  The crew would have to close up all ports to prevent the napalm from getting in, but that would only serve to do two things:  1) it would limit their oxygen supply, and 2) the heat from the burning napalm would turn their superweapon into a great big oven, and they'd end up being cooked like Thanksgiving turkeys.

Did I come down hard on McDonald?  Perhaps I did, but as I said before, I am one of those people who do not suffer fools gladly, and anyone who refuses to examine their history, anyone whose sole purpose in life seems to be the next concert, anyone who is unconcerned about the forces of darkness billowing around and preparing to destroy humanity in the name of profit is a fool.  I should know, because I was pretty much in his same position 15-20 years ago.  It took losing EVERYTHING (job, house, family heirlooms, car) to force me to examine my life and what I was doing and where I was going.  It took alot of hunger, alot of prayer, and alot of work, but I made my changes.  I also looked at the world around me and I realized that things were INCREDIBLY, UNDENIABLY WRONG.  I then made choices that have put me in a place where I can see things better, and can prepare for them

Very Bad Things are coming in this world, and they don't care if you are Republican or Democrat, liberal or conservative.  They will only be concerned if you are useful, and the moment you cease to be useful, you are discarded like a piece of paper.  They see you as cattle to be branded and then consumed as they see fit.  You think SoDamn Insane was bad?  You think Dubya is bad?  As BTO sang, "You ain't seen nothin' yet!"

I'm sorry, McDonald if I came down on you hard, but you need to open your eyes and see the world for what it is, not what you think it is.  Do the research, get the information, and ponder it.