Gullibility - a key to heaven?

[Anomalocaris]

Although it can be argued that not all believers in Christianity and Islam are gullible, it can be argued that it's all that is required to accept Christianity and Islam or that it can be the primary factor (along with bias).

What I mean by that, is that since believers are promised paradise, many believers can be gullible people. It cannot be argued that every single believer has not believed out of gullibility.

But then if gullibility can lead to belief, then why is belief always praised?

To better promote gullibility.

Any long lasting fraud must promote the key to its own success.