It’s not propaganda, it is biblical doctrine.
Num. 16: 22 God of the spirits of all flesh.
Deut. 14: 1 Ye are the children of the Lord your God.
Mal. 2: 10 Have we not all one father.
Acts 17: 29 we are the offspring of God.
Rom. 8: 16 Spirit itself beareth witness . . . we are the children of God.
Eph. 4: 6 One God and Father of all.
Heb. 12: 9 ..be in subjection unto the Father of spirits.
These are just a few of the references in the Old and New Testaments that clearly indicate that God is our Heavenly Father. I believe the Bible. I believe the words of these ancient prophets. If you interpret the above differently than I, that is fine. I certainly will not bash you for it, and I would appreciate you not bashing me with a presumption that your interpretation is correct.
Well, I cited Acts 17:29 to you before you returned the favor. Heb. 12 shows that it was written to those who have Jesus as the author & finisher of their faith (Heb. 12:2). Not all have such faith.
Eph. 4 is written for those who are part of the "one body of Christ." (I don't think Muslims who remain Muslims all of their life would qualify for that, do you?)
You cite Rom 8:16 but ignore the context of 8:15 ("but ye have received the spirit of ADOPTION"). The Bible talks a few times about the "adopted" children of God. If we were all automatically children, we wouldn't need to be adopted now would we?
Deut. 14:1...keep reading... v. 2 says "For thou art an holy people unto the Lord thy God..." First of all, were all the people on the planet at that time "holy?" ("Holy" BTW, doesn't always mean "pure"--it also means to be set apart for a sacred purpose...that describes the Israelites)
Num. 16:22 reiterates what the Bible says in other passages...He created all people. And that's also what Mal.2:10 does: "Have we not all one father? hath not one God created us?" We all have one creative origin.
But the majority of folks are "prodigals" who have walked away from any kind of spiritual familial relationship with the Creator. (What's a "family" member you no longer have any relationship with?)