Synthesis means that every race (including mosquitos for all i know) now share the same DNA or a part of it and the premise of that is "UNDERSTANDING" even when everyone understands things just fine if they are willing. With OP UNDERSTANDING comes a consensus and way of thinking that rejects indivual thinking and promotes homogeny. Again: is the principle behind joining everything.
This is a bit confused. "Understanding" is only said to be changed for synthetics, not organics. What organics get is full integration with technology, not understanding. You're just making up stuff here.
It's not irony. It's a poorly executed excuse to change the nature of a character. TIM was the very definition of a Renegade..not a traitor that would murder every human on sight and justify it with "I think i know what i'm doing!". He was better than that. What's ironic is that a change in the attitude or personality would be tolerable, of course...unless you are pulling a last second surprise like the one we had. Then, the irony becomes a comfortable, yet horrible, convinience.
I'm not sure where you're going with this. Are you against the entirety of TIM's role in ME3? Anyway, TIM never has any intention of murdering every human on sight. To the end, he thinks he's going to save them and uplift them. He's wrong, of course, but that doesn't change the intention.
In the case of the Geth, what if i saved them at the cost of the quarians? The red ending becomes a giant Nelson pointing at me while laughing!
Again, if that bothers you then you shouldn't pick that option. That could make red a bad option for you, yep. What's wrong with giving you an option that you don't like?
whatever the case, in all playthroughs, the end f*cks all your previous decisions and the core of the story.
And when you say "all," you don't actually mean "all." Your English is fine; it's the underlying thoughts that are disorganized.