No it's not. Its simplistic to compare any historic event, with different stakes, countries, relations and other specifics to any modern event.
Somebody mentioned Sudetenland:
Sudetenland is a region controlled by Austria-Hungary since the fifteenth century until Versailles in 1918. The region itself only got a name when the Germans claimed it when the Checho-Slowakians got it after the first WW. A majority was (not anymore) German speaking. There was never an invasion.
The Anschluss
@ClausThomsen was referring to was broadly supported by both Austria and Germany. I don't see how this is even mildly similar. What can you do about that. Declare war?