Coincidentally, February 21st is the same day the aliens intend to invade El Paso, landing at Fort Bliss at the very same time as the scheduled service for the lost soldiers.
It's really no coincidence at all. It's simply Fred Phelps' Westboro "Baptist"* army that carries on attacks from another planet located behind ten foot high security walls in Topeka, Kansas.
According to the El Paso Times quoting from the church's website, the soldiers "were slain by God Almighty, the Man of War, for enlisting and serving in a (homosexual) army and (homosexual) nation."
"This is the message, you simpletons: fight for a doomed nation, and you will suffer the consequences."
* As noted by the Southern Baptist Convention, any resemblance of Fred Phelps' "God Hates Fags" Westboro Baptist Church to that of an authentic Baptist church is purely coincidental.