Just the fact that there is some intelligent "who" out there means that religion enters the picture
Einstein would agree with you.
How can one teach intelligent design without getting into talk about gods/goddesses?
For starters by not labeling the intelligent designer as a god or goddess. While Einstein did sometimes use the name God in his lectures and interviews, he also used the words "spirit", "intelligence", and "Old One." Call the "who" the "designer".
Also, I'd probably introduce students to Stephen Myer and use his material on DNA.
And, even if it was being taught, since it is simply a hypothesis, it would have to be taught as such. There has been no scientific evidence to advance intelligent design to the theory stage and, thus, it can't accurately be called a theory. And you can bet the religious community would balk at intelligent design not being given theory status and, thus, being taught at a different level than Darwin's theory, even though they clearly don't understand what theory means in the scientific mileau. It would be a whole other can of worms.
You are assuming and projecting. Imo, Intelligent Design should be taught in the public school classroom as a scientific
inquiry.
And just a side note: The M-theory cannot be proven, so really, it's simply a hypothesis. It can't
accurately be called a theory either. I believe most scientists like to fudge a bit and call it a hypothetical theory. =-)
You have self-identified as a Christian on this board, do you believe in the basic Christian tenet that God created the universe and everything in it by His Eternal Word?