1)
Why does it say "Lema'an"?
1.
Radak (9): You think that you will be saved without any intent to repent, i.e.] in order to do all these Aveiros again!
2.
Malbim: You think that the Bayis will atone for what you already did, and also for future sins? Through the Mikdash, you permit yourselves all abominations!