How does a dispensationalist deal with John 3:16? or Matthew 18:17 or Hebrews 12:23 or 1 Peter 5:13 ?
What is the problem you would like to have addressed?
The idea that dispensationalists don't believe the Bible is, quite frankly, wrong headed and out of place. The fact that we disagree on how to use language and how to interpret certain passages does not mean that either side doesn't believe the Bible. It means that we disagree about what the Bible means by what it says.
Furthermore, if you really don't have any idea how a dispensationalist deals with these verses, perhaps you should not hold so strong an opinion about the matter. When you find out how dispensationalists deal with them, it might make more sense than what you currently believe.
I am always amazed by people who have staunch and dogmatic opinions on a matter, but are constantly asking what the other side believes. That makes no sense. If you don't know what they believe, it would probably be wise to not be so dogmatic that they are wrong.