You can't convince a believer of anything; for their belief is not based on evidence, it's based on a deep seated need to believe
It is far better to grasp the universe as it really is than to persist in delusion, however satisfying and reassuring.
Personally, I would be delighted if there were a life after death, especially if it permitted me to continue to learn about this world and others, if it gave me a chance to discover how history turns out.