But would the Republicans call those who switch to the GOP "traitors" and warmly embrace those who also would betray their constituents in doing so?
This is a little hypocritical, don't you think?
No, this is a situation where voters elected a conservative as a member of the conservative Party, and he's betraying them by giving power to the liberal Party, thus furthering the liberal agenda. And since there's no conceivable ideological reason for the switch, it looks to be just for power and money.
When conservative Democrats switch to the GOP, they are furthering the conservative agenda of the conservative Party, and the voters who voted for that conservative candidate shouldn't mind.
When liberal Republicans switch to the Democrat Party, it's certainly understandable, except when done for slimeball reasons of power politics, like the Jeffords thing, and directly after election to a 6-year term! With Decker, too, he switched right after being elected. Slimy!!!