There is nothing wrong about switching sides.
And there is nothing wrong with not switching sides.
Staying loyal to your team for years in days of hording as well as in days of being whacked like a mole is totally legitimate. It's nit a bad thing. And most players that do it this way are nothing but good people.
But you can notice that most of that totally delusional crap is spewed by players being proud of never switching sides.
Taking the game too seriously in a bizarre manner, dividing AH in "them" vs "us", claiming "They always Ho/Lancstuka/Spy/Horde", while being totally blind to similar behaviour by their own team. Complaining about "ENY is unfair to us only", accusing HT of being biased against Knights/Rooks/Bish. Taking Tank Town bases only "because they did it first!". Assuring each other permanently how honourable the own team (minus the dumb furballers, of course) and how detestable the two others are, that "never fight each other".
In some way it's just like in the real world... and it's sad thing in both ones.
Again: Most "loyal" players aren't that way, just enjoying the game and their comrades. But we all know plenty players that crossed the line and mutated into that kind of cartoon-nation chauvinists.
My proposal to every player: Do a virtual vacation once in a while. Do a trip "over there". Only a few days per year. Yes, you can stay totally loyal while doing so - you are not forced to fight against your "true" country (though you might learn a lot that way...). It really helps to put a many things in AH into perspective.