Makes sense to an extent... however I think this proves Tobi is an Uchiha more and does not say he isn't, because Tobi has, as he has claimed, DNA taken from the 1st Hokage and used it to perform Izangi but what I think he meant was he used it to extend the time he was able to use a single Iznagi Technique because Tobi said Danzo's Izangi lasted for little more than a few moments but somehow Tobi was able to use Izangi to avoid Konan's 6,000,000,000 paper bombs for ten minutes, or at least five minutes if he used his phasing technique then Izangi directly afterwards, but none the less that means that Tobi used Izangi for a Minimum of Five Minutes, while he said that a normal Izangi lasts for only a moment or two and that Danzo had let Orochimaru experiment on him to make it last longer which only made it last a few moments longer than that... I believe that this means Tobi must be Uchiha because then how else could he perform such a long Izangi if it was not complete, or as close to complete as Tobi can get without the full power of the Sage of Six Paths.
but my only other problem is is that if Itachi can use this Jutsu without Senju DNA than that means either Tobi lied to Konan which would not make sense as he had just killed her and had no reason to otherwise or he was wrong about Izangi and did not know that it did not require Senju DNA but he did know it was an Uchiha Technique so if he was wrong than how could he be Uchiha from Madara's time if he didn't know about Izangi's requirements, which means he probably isn't an Uchiha, but then how do you explain what I said above... this is really F-ing crazy
I'm just gonna wait till next Wensday for Itachi's explanation I just gave myself a headache
Basically, a lot of people who are fans of this manga and post here, are NOT Japanese people. There is a HUGE difference between English and Japanese, and unless you know these differences (many of which are subtle) you would not understand much Japanese.
The biggest difference is that in English, there are all these little words and punctuations that explicitly define the context of a conversation.
If I was talking about my brother getting a new car and going for a ride with him in it, in English I would say:
'My brother just got a brand new car, and we are going to go for a ride in it!'
In Japanese, the direct translation would be
'Since a car my brother received, a ride, we are going for.'
And it would be worded in such a way that you would have to understand the context of the conversation to know WHO got the car, and WHO is going for a ride in it, as well as small details like 'the car is new' and the fact that 'it's my brother.'
Context is everything in Japanese language, since they often leave out many many fine details that we English speakers need in order to understand the context of the situation.
A perfect example is that fight with Konan, and how she prepared enough paper bombs for 10 minutes of explosions, but somehow Tobi managed to survive for 10 minutes by using Izanagi. In that context, surviving for 10 minutes with Izanagi, required the use of Hashirama's DNA combined with Uchiha's powers, because Hashirama's DNA enhances the duration of Izanagi.
These are all things that are implied by the context of the conversation but not written implicitly, because Japanese language does not allow for that.
So while we have seen Izanagi used ONLY in the context of Hashirama's DNA being present, that does not mean that Izanagi requires the use of Hashirama's DNA at all. It simply means that in the context of which we've seen it used (10 Sharingan each casting Izanagi for 1 minute, Tobi using it for 5-10 minutes with a single Sharingan), that yes, those particular circumstances required the use of Hashi's DNA.
But so many of you are too simple minded to understand things like that. Which is why you sit here quabbling over tiny details of this manga to begin with.
In order to understand anything, you just need to look at the context of the situation.