If that's true then Jesus could have gone where ever he wanted. If that's true then Jesus was never in any danger. But that's not what the story says in John 7.
1 After this, Jesus went around in Galilee.
He did not want to go about in Judea because the Jewish leaders there were looking for a way to kill him.
If God had scheduled his death, then the ambitions of the Jewish leaders is irrelevent.
6 Therefore Jesus told them, “
My time is not yet here; for you any time will do.
7 The world cannot hate you, but it hates me because I testify that its works are evil.
8 You go to the festival. I am not going up to this festival, because
my time has not yet fully come.”
9After he had said this, he stayed in Galilee.
10 However, after his brothers had left for the festival,
he went also, not publicly, but in secret.
As you can see, according to the story, Jesus did not want to die yet. It wasn't the proper time. If he were leaving it to God ( the proper course of action for a Jewish prophet ) then he would not have gone in secret.
Even if I grant this as true, it doesn't prohibit Jesus from using other methods to determine a time to die that would benefit most people. Besides, if he was Jewish he would know about the pascal lamb, he would know that the first night of passover has special properties ( Exodus 12:42 ). So, no, the Holy Spirit is not the only way for Jesus to know when he was supposed to die. He could have planned to die on the first night of Passover for the specific purpose of effecting absolution for his disciples. This violates both the law prohibiting suicide and the law prohibiting looking for auspicious times. But none of that matters, in theory, on the first night of Passover.
I think you're making an unfounded assumption here. Even if I grant that Jesus cast out demons using "the finger of God" rather than dividing the demon against itself ( which isn't clear in the story ), that doesn't mean that he couldn't have been looking for an auspicious time to die in order to save his disciples.
Seeking auspicious times does not come from satan, it's not evil, it's just prohibited for Jews. Take a look at Genesis 1:14. The luminaries "
shall be for signs and for appointed seasons and for days and years." The Chaldeans were supposed to be skilled in this along with the polytheists. So, God created the luminaries, created the auspicious times, gave people opportunity to read these signs, but prohibited it for Jewish prophets.