The Arminian cannot say God is trying "equally" to each individual to elicit their faith in Jesus. This would mean each individual would "equally" get the 3 years of visual, physical exposure to Jesus just like Thomas, and then also an evening to see the nail prints in his wrist, like Doubting Thomas was graced with.
Explain what Joshua showed the gentiles in the conquest that is equal to the effort of Jesus to Thomas;; If you come up with a scenario at all, then even so, you have killed evangelism, because God has already assured equal effort and any lack on our part cannot undermine that real fair balance to all 6 billion plus (on top of previous generations.)