I believe this is lesson one. God is a spirit but Jesus is God in a body.
I believe the body is made holy by the presence of God just as the Temple was made holy by God's presence. However I do agree worshiping the body without recognizing God inside would be sinful.
I believe there is no basis for that belief.
I believe they thought they were killing a man.
I believe He is in heaven building the New Jerusalem.
I believe they saw the reality of a physically risen Jesus. That is what the Bible says.
I believe in order to believe you must keep His words. He said "You must be born again."
Sadly I believed all that to be true when I was a kid I thank my lucky stars I soon realised none of it was credible and I lost my faith. I am now 69 and haven't missed it. I do challenge those who claim it is true when they cannot provide evidence to back it up.