The khutbah was about not celebrating valentines , mother's and father's day to all muslims.
This khutbah reminds us that we should follow our own religion .
There's a saying from prophet Muhammad S.A.W that is "who that follows a different religion that is not his own religion is a follower of that religion.
The reason why christians celebrate Valentine's is that because a christian prince name valentine was imprisoned by a Roman king , Valentine was sacrifices his life in the prison to make his comrads comfortable .
When he died, it was the day where every christian had to celebrate upon his care and his sacrifices to christianity and his fellow mates.
The same with mothers day and fathers day .