But Park We is a devout Christian, so why did he drink until he was wasted?

No matter how much of a celebration party it was,
if you have religious beliefs,
you should have just had a sip or two.
It's not like someone forced him,
so I simply cannot understand how he would drink so heavily by his own will that he couldn't even recognize Jesus.
At that point, isn't he just a fake believer?
That alone shows a lack of sincerity, yet he still calls himself a Christian?
It looks truly hypocritical.