The political and military leaders of Ukraine seem as worried about their allies as they are about Russia.

Permanent economic sanctions come with a risk, especially when the sanctioned nation doesn't bend to your will. This risk goes double when the U.S. is imposing sanctions to multiple nations.
Those nations could start working together.

It's an "amazing coincidence".
Just as Trump is pushing us into a deadly military confrontation with North Korea - because REASONS - it turns out that North Korea has been up to no good on the interwebs.