1)About this post I'm glad I'm getting under your skin its making you think research and not be lazy.Not sure other people want you speaking on their behalf.Please for the love of all logic point out my half truths.
2)As for why there werent hundreds of MS using Uchiha running around I'll try to explain it as easy as possible. MS HASNT BEEN AVILABLE OR SHARED TO THEM before they were wiped out. Madra has MS tech dojuitsu he was with Itachi, Shared it with him or told him how to unlock it. Then they both killed the Uchiha clan except Sauske
2a)
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First page of the chapter Saying Madra/Tobi knows the truth about Itachi and the night he killed the clan.
2b)
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Showing the ability to implant MS juitsu into another sharingan user still everyone had 3 tomoe.
2c)
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Madra is calling the MS tech a juitsu of Itachis that Sauske hadn't used/seen before his battle.
2d)
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MS dojuitsu being transfered referanced
2e)
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Madra/Tobi saying Itachi wasnt acting alone the night everyone died. As well as that he was there as well helping Itachi.
2f)
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Madra staing he stole his brothers eyes so he could have a flawless sharingan. Rember this because Him having worked with Itachi to destroy the Uchiha makes him and Itachi the only ones with the Dojuitsu at the time of the massacare. The main point of why not everyone had a MS to contend with resuling in the death of everyone excluding Sauske.
2g)
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reasons why Madra/Tobi would have for revenge/destroying the Uchiha
2h.)
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madra leaving the leaf with EMS taking the dojuitsu with him the dojuitsu cant be copied shared if its not around until Madra/Tobi tried to take the nine tails from narutos mom. I'll show this later maybe.
2i)
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shows Itachi finding madra around the time of the attacks.
2j)
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having MS at the time of his attack after hooking up with Madra/Tobi after his exile and reciving the MS dojuitsu.
2k)
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maybe the best page ever printed if you can understand what it means.Has nothing to do with my point but it needs to be mentioned.
Conclusion Madra took his dojuitsu with him when he left and brought it back and passed it to Itachi killed the Uchiha so you dont have everyone running around with the MS and EMS dojuitsu.
3)Your the one who said Kakashi is the user of a 1000 juitsu prove to me that one of those thousand isnt or couldnt be a genjuitsu. And even though he has 1000 juitsu dosnet mean he uses them. Genjuitsu affects a persons mind any dimention or place your mind precieves or better put is a dimension. Heres a definition of dimension-proportion

roportion: magnitude or extent; "a building of vast proportions. If the dimention that Itachi created or invaded was only as deep as Kakashis mind it still takes place in a controlled independant dimension.Inside your mind isnt imaginary either its where your being lives from.
4)A sharingan evolves and gains new dojuitsu I proved that with my last post. And if you have ever seen the anime its easier to understand.
5)you state this"a sharingan does not elevate itself to MS by copying a MS because a MS is needed to make that technique..." prove your point to the best of your ability. The dojuitsu of MS are variants of other type of juitsu while haveing Sharingan or MS if you have the chakra like Madra/Tobi said he did and the battle experience with a three tomoe sharingan like Madra/Tobi says
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you can use your skills to create new juitsu.
6)Also maybe really?"Also maybe a specific MS technique IS copyable but like someone said... you need to fit the MS requirement." Also maybe I couldnt copy what you said had you not said it or done it in the first place. Who and what MS requirement might someone be able to have that is aplicable to kakashi giving him the MS dojuitsu. Itachis dojuitsu fits that catagory. What I've been trying to show is that the MS dojuitsu users have at least three tamoe and you dont have to kill to get it. Naruto is still alive in the case of Sauske proved in my posts.
7)I didnt say my posts are full proof or even foolproofed I want to be wrong so I can learn something I want to know.I've stated facts from the manga our best source of info second.Prove my half truths to be that and I'll shut up about this thread and topic.I'm not deforming anything because you dont like me proving you wrong with out your valid ideas dosnet mean I'm distorting anything. If anything hopefuly it will help clarify whats needed to obtain a MS. the base point behind the thread.