First you should have charged for the damaged tile separately, or applied the expense to their deposit. Congrats to your tenant for attempting to negotiate. You have every right to increase your rent, we don't live in a vacuum where everything remains the same.
But your increases need to be commensurate with your local market, such that you can't increase the rent much too higher than the competition has for a similar property, and expect the tenant to stay. Making a small concession for the sake of keeping a good tenant is wise, but don't get walked over on by a so-so tenant. He doesn't want the hassle of moving too.
Typically a 5% per year increase is not out of the question, so if the rent is $800 and you asked for 5% you would be increasing it $200. When faced with that, he will likely gladly accept the $150 increase.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.