tirar piedras sobre el propio tejado znamená v Angličtina

cut off one's nose to spite one's face▼(harm oneself as a result of trying to harm an adversary)
verb
[UK: kʌt ɒf wʌnz nəʊz tuː spaɪt wʌnz feɪs] [US: ˈkət ˈɒf wʌnz noʊz ˈtuː ˈspaɪt wʌnz ˈfeɪs]