Which religions to you mean for example?

Nations also cause and start wars.Should we also extingish countries?

The problem with religion is extremism, as it is with anything.As long there is people that takes things to extreme, everything will have its bad side.Its not the religion, or its organisation fault for that.As everything, the fault lies in us:humans.

No. Just because it's done wrong doesn't mean it can't be done right.

Sure, no problems would arise from that.

Absolutely not.

The indoctrination of the young by religious people should be banned so that every child is bought up with an understanding of science, reality and all religions. So single religion schools should be banned. You'll still have extremist parents indoctrinating their children but at least there will be another voice at school giving them a different opinion which they can compare.

Countries provide more than protection.They provide stability(when there is no war of course), quality of life, oportunities(government programs) and many other small perks.If countries were to be extinguished, and assuming that its laws goes with it, we would be in a state of anarchy.That would mean that if someone dosent like you, they could very well simply kill you and get away with it.And I mean, its not like "countries" would cease to exist.It would be much like in the Walking Dead:People would band together, form either tribes or small cities, which would be basically small nations, and atack and kill others for resources or simply to have more.It would just create a bigger problem in my opinion.

And you would just be treating the consequences, not the causes.Both with the country and religion topic.First, not only because if religion were abolished, it would survive nonetheless and would reorganize itself again(we have many examples through the history, such as cristianism back when it was founded.They were always hunted, but their numbers kept growing.The solution to that constant bloodshed was to make the religion official).Secondly, it wouldnt stop the terrorists atacks.The reason why there are wars or the atacks are because we are humans.We feel jealous of others, or we feel that we have more reason than others, and feel like we need to "show" them the real "path".If that problem is not fixed, banning things wont fix anything.

I personally would solve the problem by creating a world government, with varied administrative districts, without national attachment. And yes, I'd approve removing religion, if it were logistically possible to do so- which it isn't.

No, of course not. Religions in themselves have in recent years rarely started wars if you consider socio-economic circumstances.

I personally would like to see nations replaced by administrative districts, that purposefully avoided national attachment. Like, split up and unite current countries into sections optimaly for organization purposes, and give the new regions numbers instead of names, for example, with a decent amount of power to international governments (who also should have the only standing armies.)

I personally consider patriotism absolutely toxic.