Serbia isn't Poland. Get out a map. Better yet, here:
Sweden is much closer to Russia than Serbia(6) is
You have absolutely no clue what you are talking about -- but you just keep talking and talking and talking. PS This map has Serbia & Montenegro still together, but no matter, neither has changed its location.
The Polish hint didn’t suffice ?
Then have a look at your map, and consider that Polish attitudes are the same as pretty much every other nation from Georgia to Finland in the old Waraw-pact area, save for Belorussia (still a Miloslevic-style dictatorship) - and I’m not sure that even they aren’t secretly on-board.
Almost all want to join NATO and want US bases. Interesting, why do you suppose ?
Maybe they know things that you don’t ?
“Sweden is much closer to Russia than Serbia(6) is”
In Serbia people say they like Russians also because they are far enough.