Justify immoral deeds with one incapacitties

Some suggested to take precepts not so serious, saying "The Buddhist teachings do not exist for you to create suffering for yourself." and approved kill by putting his happiness as more worthy then that of "lower". Do this "Buddhist teachings" have any thing to do with the Buddhas and that of wise? *[Note that this is not given for trade, exchange, stacks, Buddh-ism but for release and might be not welcome for those seeking for trade.]*