As has been said many many times, there's a massive difference between immature tweets at 16/17 and spouting pure hatred, racism, homophobic abuse, misogyny and just nasty vile tweets. It's not that hard to understand why it's offensive - Elle and Con just don't want to admit how out of line they are. I'm a similar age to Elle and I've never ever thought such horrible things, let alone broadcast them to the world. It's not an "age" thing - it's "genuinely horrible person" thing.
They are so full of self-entitlement - they won't do duck all to understand why people are so upset and offended. Genuinely hoping it doesn't blow over because it is something that isn't going to go away.