Well, here goes what no one wants to hear but it's TRUTH!
Hebrews 13:8 says "Jesus Christ the same yesterday, today and forever!" In John 8:58 Jesus said, "Before Abraham was, I AM!" In Revelation 1:8 Jesus said "I am Alpha & Omega, the beginning and the end..." Therefore, JESUS is GOD! Now that we've established (w/WORD), JESUS is GOD, and Hebrews says HE ("Jesus Christ") is the same yesterday, today & forever," we should consider HIS Mode of Operation "yesterday" (Old Covenant) vs "today" (New Covenant)!
After GOD brought the "rebellious" Children of Israel out of Egypt , HE reminded them of how much HE had done for them and asked them to "Choose this day whom they would serve" (Joshua 24:15)! After being reminded, they anxiously said they would "serve the LORD" (Joshua 24:21)!
Joshua told them "they couldn't do it" (Joshua 24:19-20) but they were persistent in that they could! Joshua told them OK, "You are witnesses against yourselves in that you have chose to serve the LORD" (Joshua 24:19-22) but "...he is an holy GOD; he is a jealous GOD; he will not forgive your transgressions and sins. If you forsake the LORD, and serve strange gods, then HE WILL TURN AND DO YOU HURT, AND "CONSUME YOU," AFTER HE HATH DONE YOU GOOD!" HIS MOD is the SAME today!
The Children of Israel were GOD'S "chosen" people, but when they disobeyed, they suffered "consequences" (Usually for 40 years)! However, those that were NOT "chosen" of HIM (As today, NOT "IN CHRIST!"), were "killed;" as we will be in the "Lake of Fire;" when AGAINST the WORD of GOD or NOT "IN CHRIST" or (As then) AGAINST HIS "chosen" people (The Israelites)!
You see, GOD "IS" the same yesterday, today and forever! If HIS MOD was to kill those AGAINST the Children of ISRAEL back then ("Chosen" people or those "IN CHRIST"), it is the SAME today!
For HE (GOD aka JESUS CHRIST) does NOT change (Hebrews 13:8)!
Sure, under the New Covenant HE "will remember our sins no more," so it would behoove ALL to READ ("STUDY") to find out what "sins" are! Let me give you "ONE:" Galatians 1:6-9 "ACCURSED!"