Singing Indian or Christian songs with no intention of belief in it

Aslaamuakaikum

1)Is it kufr if a Muslim verbally sings an Indian/christian/Sikh/Hindu/jewish religious song without believing in the words/song? For example The words/songs consist of names of false Hindu/sikh gods e.g. RAM, LAKHAN, RAMA, BAGHWAN, RAM JEE etc. OR Hindu/Sikh words such as OM SHANTI OM, AUM, OM, JEEVAN OR other any kuffar religion words etc.

2) Is it kufr by verbally repeating or verbally singing songs/lyrics without accepting what they signify in terms of beliefs, or doing so without paying much attention to what they actually mean? For example The words/songs consist of names of false Hindu/sikh gods e.g. RAM, LAKHAN, RAMA, BAGHWAN, RAM JEE etc. OR Hindu/Sikh words such as OM SHANTI OM, AUM, OM, JEEVAN OR other any kuffar religion words etc