1. Wrong! ALL men living at the time of Jeus were more in the dark of him than they are now accept for those in that area. Do you honestly believe ALL men had "heard of christ" during his time on earth?
The offer of "grace" was to all. Those who had "law" knew of their need of it, and it led their minds (Gal.3:24). Those who had consciences (Rom.2:15) had need of it. It doesn't take much pondering to realise, given these things, that stark justice is not sufficient.
Further, if Christ is "the way, the truth and the life" (John 14:6) then would that mean that seekers and lovers of "truth" found their need of him, regardless of knowing that specific name (which incidentally was more likely "YahShuah", than the Greek derivative)?
2. Name ONE time god has used an angel in modern times to preach to someone. Just one.
Ermm... ~raises hand~
3.Name one time a stone has preached to someone in modern times.....or any other time.
Well given that the law was first of all written on stone, and also on even the stoniest of hearts...
4.Name one time god has done this in modern times. Just one.
~keeps hand raised...~