Perhaps you have been indoctrinated by the NRA in the same way as you have on a number of occasions incorrectly accused me of being
Not hardly.
thus legally by constitutional means, allowing potential gun violence to thwart the rule of law
?
I suppose. Just as protecting free speech allows potential liars and frauds to thwart the rule of law, and protecting freedom of religion allows potential clerical child abusers to thwart the rule of law, and freedom from unreasonable search and seizure allows potential hoarders of stolen goods to thwart the rule of law, and so forth. People do tend to thwart the rule of law on occasion - rob banks, even, thwarting not only the rule of law but the rule of money.
The 2nd empowers the citizenry to protect it self against laws that may be deemed tyrannical. They may do so by violent means with the use of fire arms.
It does not. It is illegal to do that, now. If the 2nd Amendment were abolished tomorrow, it would still be illegal to do that. No difference.
Therefore one could easily state that the constitution is fatally in self contradiction.
That would be silly. The Constitution sets limits on the rule of law. There is no contradiction between that and having the rule of law - quite otherwise: without limits and definitions, the rule of law ceases to exist - it becomes the rule of the King's Whim or the like.
Under what criteria do we determine what is and what is not tyranny?
Is this set out in the constitution?
Yes, in part. Of course. That's what the Constitution is for, one of its major functions, the reason for its existence.
These gun threads are very odd conversations - I would not have guessed the workings of a Constitution would be so utterly mysterious to educated people.
"... thereby leaving them vulnerable to assault."
a later interpretation and not in the context of the original time. Perhaps?
Absolutely not. Completely explicit and thoroughly argued and pressingly relevant at that time and all other times past and present.
So why are not silencers, fully automatic weapons, RPG's and tanks not included? Why are they not freely allowed in the community?
When I pointed out to you that the 2nd Amendment was carefully worded, I kind of thought you might direct your attention to that careful wording before questioning it. Do you see anything there about RPGs, for example? Do you regard a silencer as a minimum necessary piece of equipment for a well-regulated militia?
very debatable....certainly not in Australia nor the UK, nor many Commonwealth nations
The well-documented importance to central government oppression of disarming the natives, subjects, serfs, peasants, slaves, plebians, Irish, Scots, Welsh, wogs, Picts, Celts, churls, thralls, tribes, fuzzies, lower classes generally, is a universal and ubiquitous feature of the entire history of Britain from the Roman invasion through the British Empire rise and fall to the present day. It provides many of my go-to examples of disarmament and its consequences. You cannot possibly have missed it.
Are there any "well regulated" militia in the USA?
Of course. A fairly large fraction of the adults in my community have not only adequate gear but genuine professional military training - they could be called up on a day's notice, organized and coordinated within a week, maybe less. Many others have the requisite gear but inadequate training - they would take longer to organize and coordinate. Then there is a large fraction - possibly a majority - who do not even possess a rifle, field kit, etc. They would take the most time to become "well-regulated" - but the basic gear (such as a suitable firearm, etc) is available nearby, and the necessary expertise as well (both protected by the 2nd), so they would need only time and effort and maybe some money (for equipment, such as a suitable rifle).
All of these adults in my community are in the militia already, of course - the question is one of "regulation".
What does well regulated mean other than by State governance?
"Well-regulated" has nothing to do with State governance, necessarily. Militia are not necessarily regulated by State agency. Not even my local State level militia is currently regulated by State agency (let alone the national and regional militia - afaik there is no town level militia that includes me).
It's a term in English, a bit old-fashioned these days, once more commonly applied to things such as merchant and military ships, railroad and factory setups, colonial outposts of one kind or another: human endeavors involving complex organization and maintenance of machinery, animals, resources, and people. A well-regulated sailing ship would have adequate supplies of rope of the right kinds all properly stored and ready to hand via standard procedures, for example - what it needs, put in order according to principles and standards and rules.
It's use in reference to written rules of regulation - as if the written rules were themselves the regulation(s), were themselves the physical fact rather than the guidelines for accomplishment and evaluation of said regulation - is derivative, however well-entrenched. In a world as full of bureaucrats as it once was of yoemen and sailors and craftsmen, that slide in reference does not surprise us. But it need not confuse us.
Point is: cowardice and bluster came later - much later - than the Constitution, the gun control issue, or the guns themselves. They need other explanation.