Look at the US reaction towards the Solomon Islands [1] earlier this year. And we are not talking about memberships in random international organizations, we are talking about placing military assets close to rival borders. Do you think the USA would tolerate Chinese bases, tanks and airplanes in northern Mexico? What happened when Cuba asked for Soviet ICBMs as deterent against the USA trying to overthrow their government?
Sovereignty does not mean you can do whatever you want. Why do the USA and Israel try to prevent Iran from building nuclear weapons, are they not a sovereign state? Why invade Afghanistan, is hosting terrorists not something sovereign state can do if they want? You can of course maintain that sovereignty grants you the right to do whatever you want inside your territory, but then you also have to admit that not only the evil Russians are violating rights left and right.
Sovereignty does not mean you can do whatever you want. Why do the USA and Israel try to prevent Iran from building nuclear weapons, are they not a sovereign state? Why invade Afghanistan, is hosting terrorists not something sovereign state can do if they want? You can of course maintain that sovereignty grants you the right to do whatever you want inside your territory, but then you also have to admit that not only the evil Russians are violating rights left and right.