Why conflate the two issues? They are separate.
The elites from both US Parties have decided they want open borders. We can disagree and fight them on the issue by electing others.
But this issue has nothing to do and is no reason to ignore the illegal annexation and incursion into Ukraine by Russia. And it is not in US security interests to allow an enemy to steam roll weaker nations without at least economic consequences.
Putin is clearly stirring things up Ukraine to distract the Russian population from his corrupt regime and their stagnant, tanking economy. And his tactic is working - his approval rating is skryrocketting in Russia.
Similarly, neoconservatives like to focus America's attention on imagined foreign threats (does anyone seriously believe Putin is going to attack US territory?) is a distraction from their own destructive policies. A case in point is someone like McCain - he makes himself sound all tough and patriotic by fussing over Crimea, while he hands over Arizona to illegals.
The Russians are letting Putin get away with using imagined foreign threats as a distraction from the havoc his policies have caused at home. Apparently many US politicians aren't above playing the same game.