"Only Faithfull Christians who belong to 2 Thes 2:15 "2:15 -...

"Only Faithfull Christians who belong to 2 Thes 2:15 "

2:15 - Therefore, brethren, stand fast and hold the traditions which you were taught, whether by word or our epistle.

You leave out the following important part, the whole truth;
16 - Now may our Lord Jesus Christ Himself, and our God and Father, who has loved us and given us everlasting consolation and good hope by grace,

This God and Father, Jesus defined independently of himself, as the Only True God when here and You claim that this God is - Father, Son and Holy Spirit = "belonging to 2 Thes 2:10, 11" -> Because the lawlessness is sitting in your Temple.

Hence you are not holding to the traditions etc, Jesus or Paul taught 1 Cor 8:6 etc.