I said this:
"I guess none of the posts were read. Instead of
Gal 1:6 I meant
Phil 1:6. And the title was corrected a while ago."
Why the persistence since the correction has been made? Please focus on the OP.
Where does one get that they "no longer have the salvation they once had" from Gal 1:6? That is merely an opinion, and unfounded from this verse, much less any other verse in the Bible.
The verse indicates that Christians can believe a false gospel. But they are still saved because of what Jesus said in John 10:28. That recipients of eternal life shall never perish.
Did the Galatian congregation believe the gospel before turning to a different gospel? Yes. When they believed, did they receive etenal life? Yes. John 5:24, 6:47 and 1 John 5:13 says so.
Nope. Not even close. Your opinions and assumptions are not fact.
And Paul taught that there is NOTHING that can separate us from God's love, either in the present or in the future. So EVEN though some of the Galatian believers had turned to a different gospel, which was future to their believing in Christ, EVEN that doesn't separate them from God's love.