On Tuesday, local time, Catalonia United will play a friendly match with the Palestinian team.
Guardiola said in an interview with RAC1 radio: "This is far more than a symbolic match. In today's world, information is transparent, and through this showdown, the Palestinian people will see that there are still people in the world who are thinking about them.
"The world has abandoned Palestine. We did nothing. They did nothing wrong in being born into that land. All of us are allowing an entire nation to be destroyed. The damage has been done and cannot be undone. "
"It is unimaginable that anyone in this world can defend the massacre in Gaza. If our children were born there, they might be killed simply because of their birth.
"Symbolic actions can sound the alarm, but there must be practical progress behind them. Protests always have a reason, and this time it is a football match. Although it is a symbol, it is more precious to let the Palestinians feel that we are with them at this moment and fill the stadium with joy. "