IMHO "starting an intergalactic war" is hyperbole (at best).
That is the greatest understatement of the year. :)
I am actually one of those nuts who leans toward the premise that ET's are NOT actually from another galaxy but are just pretending to be. I think they are probably the "fallen ones" just assumming an identity that is appropriate for a "the technical age" on this planet. If this premise is accurate, these so-called ET's are part of the ancient war between good and evil.
I base my premise (and it is of course only a premise...i.e. I have no proof) on the basic MO of the ET's in all reports so far (whether apocryphal or not) of illusiveness, abduction of innocents against their will, sexual and genetic experimentation, obliviousness to trauma caused, etc. Whoever or whatever they are (if they indeed "are"), their intentions are not friendly or honorable, but seem malicious and malipulative...and very goal oriented. And such goal seems to be clearly one that can be accomplished via genetic manipulation.
IMHO