I get what you're saying on the one hand, but then there are shabads like the one below, and many others. Are you suggesting that this shabad is simply using the word 'Allah' in the last tuk not to mean the Muslim Allah, but as a word that a (perhaps simple?) audience would understand to mean "Allah" but actually orients the listener towards (for lack of better language) Waheguru within?
Like if I can use the "Who Moved My Cheese?" metaphor for example, Kabeer suggests the listener to reflect upon the cheese hidden in each and every heart, but he doesn't actually mean cheese (Allah), he means that if you reflect on cheese hidden in each heart you will hopefully connect with Waheguru?
ਆਸਾ ॥
Āsā.
Aasaa:
ਰੋਜਾ ਧਰੈ ਮਨਾਵੈ ਅਲਹੁ ਸੁਆਦਤਿ ਜੀਅ ਸੰਘਾਰੈ ॥
Rojā ḏẖarai manāvai alhu su▫āḏaṯ jī▫a sangẖārai.
You keep your fasts to please Allah, while you murder other beings for pleasure.
ਆਪਾ ਦੇਖਿ ਅਵਰ ਨਹੀ ਦੇਖੈ ਕਾਹੇ ਕਉ ਝਖ ਮਾਰੈ ॥੧॥
Āpā ḏekẖ avar nahī ḏekẖai kāhe ka▫o jẖakẖ mārai. ||1||
You look after your own interests, and so not see the interests of others. What good is your word? ||1||
ਕਾਜੀ ਸਾਹਿਬੁ ਏਕੁ ਤੋਹੀ ਮਹਿ ਤੇਰਾ ਸੋਚਿ ਬਿਚਾਰਿ ਨ ਦੇਖੈ ॥
Kājī sāhib ek ṯohī mėh ṯerā socẖ bicẖār na ḏekẖai.
O Qazi, the One Lord is within you, but you do not behold Him by thought or contemplation.
ਖਬਰਿ ਨ ਕਰਹਿ ਦੀਨ ਕੇ ਬਉਰੇ ਤਾ ਤੇ ਜਨਮੁ ਅਲੇਖੈ ॥੧॥ ਰਹਾਉ ॥
Kẖabar na karahi ḏīn ke ba▫ure ṯā ṯe janam alekẖai. ||1|| rahā▫o.
You do not care for others, you are a religious fanatic, and your life is of no account at all. ||1||Pause||
ਸਾਚੁ ਕਤੇਬ ਬਖਾਨੈ ਅਲਹੁ ਨਾਰਿ ਪੁਰਖੁ ਨਹੀ ਕੋਈ ॥
Sācẖ kaṯeb bakẖānai alhu nār purakẖ nahī ko▫ī.
Your holy scriptures say that Allah is True, and that he is neither male nor female.
ਪਢੇ ਗੁਨੇ ਨਾਹੀ ਕਛੁ ਬਉਰੇ ਜਉ ਦਿਲ ਮਹਿ ਖਬਰਿ ਨ ਹੋਈ ॥੨॥
Padẖe gune nāhī kacẖẖ ba▫ure ja▫o ḏil mėh kẖabar na ho▫ī. ||2||
But you gain nothing by reading and studying, O mad-man, if you do not gain the understanding in your heart. ||2||
ਅਲਹੁ ਗੈਬੁ ਸਗਲ ਘਟ ਭੀਤਰਿ ਹਿਰਦੈ ਲੇਹੁ ਬਿਚਾਰੀ ॥
Alhu gaib sagal gẖat bẖīṯar hirḏai leho bicẖārī.
Allah is hidden in every heart; reflect upon this in your mind.
ਹਿੰਦੂ ਤੁਰਕ ਦੁਹੂੰ ਮਹਿ ਏਕੈ ਕਹੈ ਕਬੀਰ ਪੁਕਾਰੀ ॥੩॥੭॥੨੯॥
Hinḏū ṯurak duhū▫aʼn mėh ekai kahai Kabīr pukārī. ||3||7||29||
The One Lord is within both Hindu and Muslim; Kabeer proclaims this out loud. ||3||7||29||