When we ask people who we call them as kafeer to follow Allah's revelation, Allah says that they will answer like in surah Al-Baqarah verse 2:170.
When it is said to them, “Follow what Allah has revealed,” they reply, “No! We only follow what we found our forefathers practicing.” Would they still do so, even if their forefathers had absolutely no understanding or guidance?.
Honestly I have some non-muslims friends and in my experiences they never answered me like that. They just said that they're not convinced. Nothing else. Just like us, they also believe that they follow the true religion, not just their forefathers'.
But at the same time very often I heard muslims especially sheikhs say something like this.
We must be grateful to be born in Islam.
Something weird here. How can we be grateful to be born with the religion of our ancestors while at the same time the verse itself says that we need to follow Allah not our ancestors since they know nothing.
Let's talk statistics. Out of all growth of any fastest growing religion today, only 0.6% come from conversion. The rest is from higher fertility rates. That means 99.4% of someone's religion was inherited from their parents not because they learn the truth.
So how to prove that we're not among those who inherit their faith from their forefathers like said in the verse above?.