Bigfoots, stargates, and the BIble

Recently I was reading some of the writings of a Christian writer named Steve Quayle, and was wondering if what he teaches is supported by the Bible. From what I understand he teaches that the Nephiliim mentioned in Genesis 6 were fallen angels, and that their offspring were literal giants. Then, as time progressed, these giants somehow ended up becoming the modern day bigfoots. Along with their large size he also teaches that they can use 'stargates' to travel around, and that they can move objects with their voices. My question I suppose, is whether or not any of this is biblical. (Here's the link to his website, he used to have another website called genesis6giants but I cant seem to find it. https://www.stevequayle.com/