How can you Christians say that Jesus is the only way to heaven?

Are you saying that if a person does not believe in Jesus Christ, they are going to hell?

Jesus Christ Himself said, "I am the way, the truth and the life, and no one comes to the Father except through me" (John 14:6 NKJV). If humankind could have reached God any other way, Jesus would not have had to die. His voluntary death on the cross makes this fact even more compelling.

Don't all religions teach the same thing?

"Don't all roads lead to God?" people often ask. "If a person is sincere in his or her beliefs, won't he or she get to heaven?" If you allow that all beliefs are true, then by what standards do you live? All belief systems cannot be true, because they cancel each other out. If you take time to look at what each religion teaches, you'll find that only Jesus Christ died for our sins and rose again. The Bible teaches that Jesus Christ, the Son of God, died on a cross for our sins, that He paid that debt in our place, and that if we will turn from our sin and follow Him, we can be forgiven and know that we will go to heaven.