Forgive my ignorance - I never read them b/c I'm not interested in main news but Could you point me where RT/Sputnik said "a candidate is planning to use FEMA to invade Texas" and "force all white people with guns to have abortions."

They strongly pushed these narrative through social media campaigns:

https://en.wikipedia.org/wiki/FEMA_camps_conspiracy_theory

https://en.wikipedia.org/wiki/White_genocide_conspiracy_theo...

Even president 45 fell for this admittedly pathetic troll:

http://edition.cnn.com/2016/01/22/politics/donald-trump-retw...

Unfortunately the links you posted don't provide any evidence or suggestion that RT or Sputnik promoted these stories.

Jade Helm is mentioned as one of many stories mentioned in this testimony by Clint Watts concerning on Russia's information war: https://www.thedailybeast.com/clint-watts-testimony-russias-...

It does seem like there are a fair bit of analysts in United States intelligence (Clint Watts being on that side of the fence, essentially) who strongly believe that RT or Sputnik are less media sources, and are instead funnels of disinformation propaganda designed to destabilize the United States government. Whatever your personal opinion of these media sources are, in this light, Twitter's action here is hardly surprising.

I think they are talking about Jade Helm 15, and RTs coverage of it.

For example: https://www.rt.com/op-edge/272920-us-army-jade-helm/