Unmerited grace is given to all. The holy scriptures testify to that. Let me show you.
Matthew 5:43-48 Ye have heard that it hath been said, Thou shalt love thy neighbour, and hate thine enemy. 44 But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you; 45 That ye may be the children of your Father which is in heaven: for he maketh his sun to rise on the evil and on the good, and sendeth rain on the just and on the unjust. 46 For if ye love them which love you, what reward have ye? do not even the publicans the same? 47 And if ye salute your brethren only, what do ye more than others? do not even the publicans so? 48 Be ye therefore perfect, even as your Father which is in heaven is perfect.
It is evident that God is merciful to all and gives grace to all.
If you reply that sunshine & rain are not the same as saving grace then I say,
"
Yes, that is true.
Yet saving grace is God giving himself in creation as the man Jesus Christ
and sunshine & rain is God giving life by means of light and rain which cause food to grow which are things he has created
so although they are different and the former is by far the greater (infinitely so) it is nevertheless true
that the goodness and kindness that motivates the latter also motivates the former
only more so.
It is a matter of degrees.
God loves his human creation and is not willing that any should perish but that
all should come to a knowledge of the truth and be saved."
Maybe that will not satisfy you but it satisfies me and possibly others in CH too.