No, science teachers should not be trained to teach from the holy books. That's what we have RE for. Science teachers should teach science. My RE teachers taught the major religions, my science teachers taught science, my 9 year old sister is being taught the same way as are the children of friends of mine, I think it's a good process. Religion in RE/RS class, science in science class.
holy books? what is holy about books QSE? it is just some language script on some paper. Well I am not saying Science teachers should spend their time preaching religious gibberish but whenever the so-called religious scripture relate the words in them to the natural science overtly or covertly then they need to be exposed and best guys to do that is Science teachers. You yourself put out some examples in your post
Let's say the Bible is taught by a science teacher.
....Leprosy can be treated via taking two birds, killing one of them, dipping the living bird in the dead bird's blood and then shaking the living bird to sprinkle the dead bird's blood on you seven times......
........... Likewise with Muhammad and the camel piss............... They know it's bullshit but would have to teach it as valid anyway because of hate laws
Clearly those are scientific claims and who will be a better a guy to expose such nonsense and explain kids that " it is rubbish", if not a a Science teacher?? A fellow who practises and teaches/preaches religions to kids will hide all that dirt under the flying carpet.
Holy books should NEVER be taught in a science class. Never. That's what we have RE for.
Again you have to remove that word
"holy" from your vocabulary Q. S. E. Quantum .. Saturated .. Electric Field??