You are saying that no incontrovertible evidence exists.
Belief in it has to be a matter of faith and prejudice.
In the absence of evidence, I will just keep an open mind.

No. I am saying you are NOT keeping an open mind, and are dismissing real evidence because of your faith and prejudice. Which is exactly what you're doing.

When we know for an absolute fact that people are actively making up lies, is it not perfectly reasonable to be sceptical of all such claims without good evidence?
Let's keep open minds.

Being skeptical of all claims and keeping an open mind are mutually exclusive. The problem is your definition of "good evidence" which clearly means "evidence that has been stamped OK by Israel."

I've noticed that the Hamas apologists are fond of finding and quoting Jewish voices of dissent.

You don't accept what Arabs say about the crisis. And now you deride people putting up the words of Jews about the crisis. Just whose word will you accept? Oh wait. I know. Only people who find no fault with Israel or the IDF.