The photo contains two hashtags: - #Kayseri - #terörelanetolsun The joke is that the hashtags are both related to Kayseri. The first one is simply the name of the city. The second one, which translates to "curse on terrorism", is a general message of condemnation against terrorism. The joke is that the two hashtags are often used together in online conversations, which creates a sense of over-the-top dramatic response to any mention of Kayseri. This is a common trope used by people who are making fun of Kayseri or its people. The humor lies in the exaggerated reaction to the city and the tendency to associate it with terrorism.