How does trust in jesus save you from beheadings?

It doesn't. Jesus is a mythical figure. If you are going to be beheaded, it will happen whether you believe in Jesus or not.

Save doesn't mean the body, but the soul. This material world is a place of danger in every step. One can die by slipping on a banana peal and break his head on the treet, or some crazy man come with a gun and shoot us. The body is called to perish in one way or another. There is not science, spiritual nor material which guarantee the permanet protection for the temporary body. The body can be destroyed at any moment. Faith in God or Jesus, save us from contamination of our consciousness. The point is, in what state of consciousness we are going to die. If we are going to die thinking in my girlfriend, in my family, in my country in my new car, in my dog, etc. or, we are going to die fixed our consciousness in God. That is what realy matter. Jesus himself was killed. Where was God to protect him? That is the point, God always protects one who is constantly serving Him with love, dead or alive.

It does not and is never meant to. John 15

20 Remember the word that I said to you, ‘A slave is not greater than his master.’ If they persecuted Me, they will also persecute you; if they kept My word, they will keep yours also.

15:20 slave … master. That axiom, spoken also in 13:16, reflects the obvious truth that led Jesus to inform His disciples. They could expect to be treated like He was treated because those who hated Him don’t know God (v. 21) and would hate them also; and conversely, those who listened with faith to Him, would hear them also.

MacArthur, J. F., Jr. (2006). The MacArthur study Bible: New American Standard Bible. (Jn 15:20). Nashville, TN: Thomas Nelson Publishers.

It sort of doesn't. If you, me or anybody else were kidnapped by terrorists and they decided they were going to behead us...then they would.

Huh

So far, so good.