Morrissey -- Diabolical Heckler Derails Show

Morrissey is clearly not a fan of Polish jokes ... because he stormed off the stage of his concert after a heckler evaded band members and kept on ranting.

Morrissey was performing at Klub Stodola when a heckler yelled something and unnerved the singer 25 minutes into his set.

Morrissey left the stage in a huff and his band tried ferreting out the heckler but couldn't find him ... so the venue announced the singer would not be coming back because he didn't feel safe.