Exactly, as I said earlier, God sees actions of all people both who follow Him and who Don't follow Him.
God punishes evil done by man to purify the earth with goodness as u purify ur house.
The answer is simple.
1) God created humans and gave them free will (u r self witness for this)
2) He wants to see who will do good and bad according the rules set by God (as He creator and owner of humans & earth)
3) Good (according to God's rule) shall be rewarded
4) Bad (according to God's...