He shouldn't have said what he did but he has a point. He shouldn't be compared to Lindsey. Justin acts like a normal teen would Lindsey while she seems to be a lot better now was having severe issues. To compare them is unfair.
Justin is forgetting Lindsay was once a very successful teen star on top of the world too... If it can happen to her it can happen to him. Especially with that egocentric, narcissistic attitude.
That's not even the point though. He is so self absorbed that he didn't even think to apologise for what he said about her.
There's no apology he's so pathetic. Don't be an asshole and then apologize for it how spineless. The media backlash he has been facing lately is all deserved