I guess for me, I'm more concerned for those who will believe the lies he espouses and claims to know from experience than I am for him. He made his choice and chose to believe the lies. I've seen more than a few claim to be genuine believers and attack the gifts of the Spirit, based on supposedly personally being an active part of it for a while. If they are genuine, why would they ever fake it? And, fi they were genuine and they were publicly turning away, there are things said in Scripture that apply to them. They chose it. To me, there is a big difference between being born into a church that doesn't believe in the gifts and claiming that you were part of a church that honored God's gifts and walked away from those gifts willingly.
When I got hurt and disillusioned with my Charismatic church and walked away from it, not wanting to remain in the Pentecostal movement, and went and joined an Anglican church, much of what I was taught in the Pentecostal church went by the board as well. But, interestingly, I didn't stop praying in tongues, neither did I want to, and I never have, even though I spent years in Baptist churches and as an elder in the Presbyterian church.
This shows me that the ability to pray and speak in tongues that I have did not come from the Pentecostal church, although it was there that I learned about it. I didn't receive it in the first place in a church service. It was on my bed in the hostel where I was living and in the middle of a week day. When I received the revelation of the reality of God two years later, I still kept praying in tongues.
When I did go through a time when I seriously doubted whether tongues was real, and I asked God about it, He replied, "Why do you think I devoted a whole chapter of My Bible to give correct teaching on it if I didn't mean for people to be able to use it, then and now?" He left me in no doubt that tongues was not just a Pentecostal thing, but it was the ordinary ability of every new covenant believer. Since that time, I have absolutely no doubts about the tongues that I use to pray and speak are totally genuine.
If people choose not to use the ability, that's their business. But to go around saying that those who use the ability are in error and false, that is entirely another matter. These people are in danger of insulting and grieving the Holy Spirit and they will pay the price for that.
In my experience, I could never turn my back on the Holy Spirit and His gifts. It is just not in me. I have been through thick and thin in my life and nothing has happened to me to such an extent that I have ever felt unfairly treated by the Lord, even though I have felt that way in regard to churches. God is not the church and the church is not God, and the gifts that I have been given were not given by a church, but from God, and although I can walk away from a church, God still knows the way I take and He continues to walk with me.
I think that is the attitude of any genuinely converted believer.