Everyone has to stand before the judgement seat, so do not rely on entering the Kingdom of Heaven. Nobody who leads others astray is eternally secure, unless they are cast into chains.
About apostasy, the biggest apostates were the Israelites, God's own people. They were worshipping idols and false gods like there was no tomorrow, they were the biggest backsliders ever, and no, they were not eternally secure. So do not go telling people they are.
Not sure why you are talking about apostasy as it has no relevance to our current discussion.
Nobody who leads others astray are ES includes you.
Do not forget that.
So do not go telling people who believe who believe in OSAS they use it as an excuse to sin, do not go telling those who believe in OSAS are leading people astray.
Your thoughts
1 Corinthians 3:11-15
11 For no other foundation can anyone lay than that which is laid, which is Jesus Christ. 12 Now if anyone builds on this foundation with gold, silver, precious stones, wood, hay, straw, 13 each one’s work will become clear; for the Day will declare it, because it will be revealed by fire; and the fire will test each one’s work, of what sort it is. 14 If anyone’s work which he has built on it endures, he will receive a reward. 15 If anyone’s work is burned, he will suffer loss; but he himself will be saved, yet so as through fire.
You have yet to answer my question to you.