A swiss lab claims the nerve agent is a Nato product

Really? I will trust OPCW over this supposed "Swiss lab."

The latest jolly jape is that the rain washed the poison off the doorhandle and therefore degraded it.

Really? Even if true how would that be relevant? Who is claiming it?

Photographs show a poison gas cylinder supposedly on a roof, beside a hole made by something of very different construction.

Huh?

Need I continue?
It is very convenient to toe the party line.

No-one is toeing a party line.
Everyone except RT and the dominant extremists here accept the obvious truth.