I could say the same of every monotheistic religion. For example, one of the most famous Church Fathers, one still recognized as a saint by most Christian denominations, wrote as early as 4th century:

"Should you hear any one in the public thoroughfare, or in the midst of the forum, blaspheming God; go up to him and rebuke him; and should it be necessary to inflict blows, spare not to do so. Smite him on the face; strike his mouth; sanctify your hand with the blow, and if any should accuse you, and drag you to the place of justice, follow them, and when the judge ... calls you to account, say boldly that the man blasphemed the King of angels!"

But we don't judge all Christians based on that. Neither should all Muslims be judged on the basis of a particular interpretation of their scriptures, especially when the vast majority of them do not subscribe to it at all.

I know a lot of Christians and other religions where people can openly say they are atheist openly and their family(and society in general) is okay with that. The problem with ISLAM is it is so dogmatic, no one can oppose it irrespective of education, in fact they double down when questioned or shown facts and preach tolerance to others or point other religions quotes. This is what i hate about ISLAM. There is some thing deeply wrong with it, they can not take criticism even if you are in the STEM field.

I know of a lot of Muslims to whom people can openly say that they're atheist.

For example, my grandfather was a Muslim. His wife was Christian. His son - my father - is an atheist, and so am I.

It sounds like your problem isn't with Islam, but rather with a strawman that you have constructed.