False. Jesus called him the devil. He was a thief from the beginning. he continued to live in sin even walking with the group. that is not a saved person.
You're at least willing to answer a question directly instead of dodging it or avoiding it. But you're still incorrectly uniting two related things together that are not the same thing.
Being saved =/= the kingdom of god
Being saved is not the kingdom of god. That's probably where the confusion lies. We are saved from our sins and we then proceed towards the promised kingdom of god, receiving a down payment on that promise with the receipt of the Holy Spirit.
[Just like Israel was saved from Egypt but then had to proceed towards their promised kingdom.]
Christ is the embodiment of the kingdom since he's the king, with all the benefits that come with that kingdom (i.e. authority over all the works of the satan).
Judas tasted the kingdom along with every other apostle because he was with Christ and received authority from him to cast out demons etc...but Judas sinned against the king, betraying him.
Judas wasn't saved. But he tasted of the kingdom but sinned
willfully. Compare that to Peter who denied Christ out of fear.
This serves as an example of what Hebrew says; that those who taste of the heavenly gift and the powers of the age to come (i.e. the kingdom), who sin willfully, can't be once again renewed.
This is exactly why the couple who sold their land to support the movement but willfully lied (i.e. sinned) about how much they received (trying to keep some for themselves) were struck dead, because they tasted the kingdom in the form of witnessing the Holy Spirit of Christ and they knew the truth.