We see alot of criticism about people changing their opinions. Either people accuse them of being wishy washy, or they use the persons previous opinion as a weapon against them (this is the one we see alot here), It's ridiculous.
If you change your opinion based on new information, you are smart, you are a sensible and reasonable human being and the planet needs alot more of that. We shouldn't be so ashamed of being wrong that we stick to our guns no matter what, it causes so much damage the world over.
We should all strive for this, we should all reevaluate our opinions and see if they are still based in logic and fact, it is surprisingly difficult as no one likes to be wrong, but we should do our best, the world will thank us.