Assalaamu alaikum,
Someone is asking about when 'Eesa (as) / Jesus (peace be upon him) comes back, why will he kill all the swine/ pigs. Will he kill them all or just some? Also when he breaks the cross, is it just one of them and is it symbolic or all of them?
Jazak Allah khair

All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His Slave and Messenger.

Scholars mentioned that killing the pigs and breaking the cross by Jesus means that he will allow killing pigs and prohibit keeping them and will allow breaking the crosses and prohibit owning them as a way of invalidating the Christian religion. According to Ibn Hajar “He will invalidate Christianity through actually breaking the cross and will refute the Christians’ allegations regarding glorifying it."

However, this does not mean that he will kill every pig and break every cross with his own hands; rather, he may kill some pigs and break some crosses and command people to do the same.

For further information, refer to Fataawa 82052 and 88216.