Question: Why the patriots did these things? hard questions.

[Dirty Duck]

Have you finished the game yet? I think it will give you a satisfactory answer to these questions, if you're still wondering afterwards though:

MGS2 spoilers:

It was all a carefully curated plan to test how The Patriots can control the narrative in the Information Age and control people's actions by dictating what context is created around events. The part of GW affected by the virus is not the entire system, but instead a partition of the system that was being used as part of the S3 program. It, and Arsenal Gear, isn't actually important to The Patriots. Both were theatrics to see how they could control the outcome of the events. It was all staged. The entire thing was essentially a testing ground for aspects of The Patriots plans that were more important than anything going on in the Big Shell.

i see! so you mean that s3 was the importnat part while GW and arsenal are disposable? even though the GW will control the flood of information around the world, they didn't care about it for real?
thanks, and can you see what i asked in metal gear solid 1 where you have already chatted with me a day ago? i have asked you there another question kind of...thanks a lot

Think of it like they had a backup of GW they used for this. They didn't risk the actual system, just the backup.

Just to make sure i get you right: they made Emma create GW just for Raiden to have a mission to stop solidus because the knew solidus will want to seize Arsenal and GW..that way create a another "snake"?

The worm cluster Emma made was all part of it and the AI claims to have been perfected after it was used. They had a system in place to stop the virus destroying the entire GW and everything that happened was planned by them. Also, the idea of creating a new Solid Snake was what Ocelot thought the S3 program was-the Solid Snake Simulation. In reality it's the Selection for Societal Sanity and the aim isn't to make another Snake at all but to affect society and individuals within it to take actions planned for them by The Patriots. They used the data and results of the incident to perfect GW, which was always their plan. Everything else meant little to them.