That is BuzzFeed, though. It's kinda their thing. Much like how Fox has its own distinctive content and agenda, these groups or blogs are purposefully trying to convince anyone that reads them of their cause, or strengthening the converted.So though a comments section may be provided, it's also not conducive to useful debate as such. You can learn the arguments and incantations of that side ("microagressions" or "everyone gets a trophy!"). As far as testing the mettle of your position? Well...
In my experience, it's hard to find an appropriate place and time to debate. You end up with folks that are too passionate or folks afraid of any sort of conflict. Ultimately, it's best just to know when to walk away early on.