NATO considers Kaliningrad a “security threat” to its members.
Europe forces Ukraine to choose between being with, or against, Russia.
Europe does not force Ukraine to do anything. Ukraine is recognised in international law as a sovereign nation-state, with its own flag, nationality, language and with a democratically-elected president and parliament.
In 2013 Ukraine was expected to "sign an association agreement with the European Union at the EU Eastern Partnership Initiative Summit in Vilnius, Lithuania; however preparations for signing the agreement were stopped. Back then, the Ukrainian government explained they were taking this decision because of economic problems and their need to improve relations with Russia. Russia had repeatedly warned Ukraine against signing the agreement on the eve of the Vilnius Summit, promising a sharp deterioration of economic ties between the countries. The European Union regretted the decision and said that the door to the association remains open. In Ukraine, the same decision triggered a series of protests known as Euromaidan".
See a similar case Ukraine enslaved to Europe because of the Maidan.