If anything, she indirectly helped it by helping to drain some of the Sunnis away from Syria.

We have to disagree here. At worst they work the jobs freed by Shiite soldiers but I think many can be turned into soldiers themselves.

No: the article is long

I don’t see that in the linked article.

https://en.m.wikipedia.org/wiki/Shia_Crescent

Overview

​With Syria under control, Iran cannot do that.

Why would Iran want Assad overthrown?

They don’t. From the western point of view: We control Syria now which prevents Iran from supplying Lebanon.

Isn’t this (or at least was) the same Russia that exported natural gas to Germany?

Yes. With the availability of Qatar gas there would be no need for Russian gas, thus lower profits for Russia.

Hasn’t the crime gone down?

Doesn’t matter.

even if all the splinters oppose that?

Of course then the dismantling can be prevented. Would you bet on unity?

IIUC

you do