I will say one thing, we can mess with Russian interests but they can do the same thing to us. We will see how this pans out, I don't trust Putin, but not to a degree where we would be in a proxy war with them, that's what some say Syria is. Syria is not worth it. We won't see Europe attacked. Just play by the rule book. Yes, I believe Trump has been too complacent with Putin... how we will see.
With North Korea, I think someone in the Admin or Pentagon said, China was helping us, and then, Russia would undo the good China did, by evading the sanctions, etc.
There is also a chance, a lot of these hostile feeling harm the greater good. I'm sure the Russians killed that spy and that is not acceptable. At the same time, this dossier stuff, may well be doing damage.