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What does 'sending delusions' in order to deceive say about someone's character?"
TRUTH -> Only that will be tolerated.
If you back up on the verse you mention above, the lawless (untruths) is sitting in the Temple = people, making out to be God and is being worshipped as such, you know, like a created trinity god etc.
Reason of the delusions as above = 2 Thes 2:10 -
and with all unrighteous deception among those who perish, because they did not receive (accept) the love of the truth, that they might be saved.12 -
that they all may be condemned who did not believe the truth but had pleasure in unrighteousness.Example and power of this deception -> many believe that the Temple there is a prophesy of a 3rd Temple, despite the same writer telling them at least 3 - 4 times in Cor, that they are the Temple.
Another amazing delusion that the trinity believe -> John 17:3 - The Father who Jesus independently of himself defines as the only true God when he was here, they say that this only true God there is - Father, Son and Holy Spirit.
OH MY, what a whopper of a delusion that is
And they will fight you until the cows come home, supporting this obvious delusion, just ask Ppm LOL.
And this lawlessness is not exposed until Jesus comes and exposes it
, oh no, that appears to be the time of the Wrath
2 Thes 2:8.