in my opinion, he shouldn't call chuff-chuff and yunus gobar types for debates and challenges and all. i may be wrong, but talking to trash like this is below his stature. he should just point out such dajjals for the rotten, senseless shayateen they are and that's it - just mention for that shaytan to cure all the cancer patients in birmingham is enough. no need for challenging him to cross paths and debate.
yunus gobar - what's his worth in knowledge or common sense or anything? he's more useless and hopeless than a retarded heroine addict.
i think he should only engage with "mainstream" heretics like senior wahabis, shias, ismailis etc., not clown-heretics like abu layth, chuff chuff, yunus gobar etc.