Judgement and Salvation together?

So as you can see im very intreigued by this topic of clouds.... According to Matthew 24, Christ will come on the clouds. But as im sitting at my desk doing some work, i cant help but think... God must come to bring salvation but he will also come to bring Judgement. There are so many diffrent religions in the world today... alot in which they dont believe in creator God. If God came on a cloud (literally), who wouldn't believe. Even Muslim or Buddaist, they would believe!Ha some one that came out of a cloud.... we'd all believe...God must come to bring salvation meaning not everyone is going to accept. Wether we believe or not thats the way to the kingdom of heaven. it doent make sense that his second coming he will bring salvation and Judgement... First he must bring salvation (then we can be saved) and later bring Judgement... Lodgically it makes sense, doesn't it?