It may surprise you to learn that the person in the Bible who talked the most about hell was Jesus - and that's one reason why Christians take it so seriously. Jesus warned, "Do not be afraid of those who can kill the body but cannot kill the soul. Rather, be afraid of the One who can destroy both soul and body in hell" (Matthew 10:28).
I realize Jesus' words may not have much impact on you right now, since you don't believe in Him. But have you honestly realized what it would mean if God simply ignored all the sin and wickedness in the world, and never condemned anyone for their evil deeds - no matter how monstrous? This would mean there is no such thing as right or wrong, and tyrants like Hitler or Stalin would never be judged for their evil deeds.
But the Bible says otherwise. Evil is real, and someday God will judge it and bring it to an end. The Bible warns, "For God will bring every deed into judgment, including every hidden thing, whether it is good or evil" (Ecclesiastes 12:14).
Yes, God's judgment is real. But listen: You don't have to fear it - and the reason is because Jesus Christ took upon Himself the judgment and hell we deserve. He did this because God loves us and wants us to be with Him in heaven forever. Turn to Christ and open your heart to Him today.