Do Jehovah Witnesses believe they are the true religion because they are going door to door?

Jehovah Witnesses believe that they must preach to other their beliefs because they are 'right', just like every other religion. What most people don't realize is, humans are born with instincts. The knowledge that they weren't born with gets passed down and that became religion. Take Muslims for an example, in their set of beliefs, they are told that eating pork is wrong. It makes sense because pork probably wouldn't the best quality, nor very healthy in Saudi Arabia. What we don't know already we are taught by religions, people wanted a reason to be there, and now we fiercely protect our beliefs because we are so sure that they are right.