Some propaganda ministry trying to honeypot the Taliban, Iran, and Argentina is totally unrelated.
>if they're running on a left wing platform, may have already been targeted for disruption via JTRIG or an equivalent US group.
There is absolutely no indication that anything of sort goes on. There are no shortage of left wingers making all sorts of noise in the UK and US.
The NSA and GCHQ aren't allowed to blackmail politicians. If they wanted to break bad, even if you destroyed them today, they could reform in like 20 minutes by just storming Google's headquarters.
If you don't think that the government will follow the law and the will of the people, why do you want to make a law preventing them have any capability. Either they follow the law or not.