Nice sermon.
Except you're way off the mark.
If I had not been sure that it is because you are ignorant of Scripture (though you quote it), I would have said you were deliberately mixing truth and lies in order to promote something which is unscriptural.
Even your example folds up and crumbles because the salvation Peter is speaking about is not of the eternal salvation which Christ authored, and which you can't seem to understand.
After Christ redeems you, and when the Spirit regenerates you and open your eyes to your condition, then you are under obligation to repent, and to these Jews, Peter was saying "separate yourselves", that is, get out from among them, "save yourselves from this untoward generation", that cry is not unto eternal salvation. It is to timely salvation.
So, I am ignorant and mixing truth with lies?
It is you that does not understand scripture. You must repent before you can receive the Spirit as Peter himself preached.
Acts 2:38 Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost.
Peter told these men to repent and be baptized in the name of Jesus for the forgiveness of their sins and THEN they would receive the gift of the Holy Spirit.
It is not I that twists the clear teaching of scripture.