One who behaves toward others congenially and courteously, but is not courteous with God and is ungrateful and disobedient, most probably his good behavior and friendliness toward others stems from his spiritual weakness and demagoguery. SOURCE: @PanahianEN | H.I. ALIREZA PANAHIAN
Being ungrateful for the blessings…
Being ungrateful for the blessings and not treating the God-given blessings in a thankful way, will cause the straitening and decrease in the blessings and will be followed by Allah’s torment and displeasure: ‘…And if you are ungrateful, My chastisement is truly severe… Source: AT-TAWHID OR MONOTHEISM | AYATOLLAH MISBAH YAZDI (D)