"I am an agnostic, and I think I find both, atheist and religious people, both ignorant and arrogant in certain ways."
Well... which are *you*? A theist, or an atheist?
"It's blind faith both sides."
No, it isn't.
"Faith" is belief in something that is unsupported or contradicted by evidence. Atheism is a *lack* of belief in something, and cannot logically be based on "faith".
"You can't really be sure that there is no God or that there is."
I don't *need* to be "sure". The nonexistence of God is the null hypothesis. The burden of proof isn't on me; it's on the people claiming that God *exists*.
I can't be "sure" that Yoda doesn't exist; that doesn't mean I *need* to be in order to *lack* a belief in Yoda's existence.
"It's like saying that we are the only beings in the whole universe."
No, it's not:
"Aliens and God: An Analogous Conjecture?": https://sites.google.com/site/alexisbrookex/aliens-and-god-an-analogous-conjecture
"Maybe there is an afterlife and not necessarily a God."
And *maybe* we can commune from the netherworld of the Force.
But until there is evidence to believe something *is* true, there's no reason to *believe* it's true.
Addendum: "@Alexis - I am sure you would have been quite an asset when people though atom was the smallest particle in the universe, and the sub-atomic particles like proton, neutron and electron weren't found."
Sorry, I don't follow you.
Protons and neutrons are comprised of quarks; two up quarks and a down quark, and one up quark and two down quarks, respectively. Electrons are fundamental particles, although both electrons and quarks are comprised of condensed photons.
But then, particle physics has nothing at all to do with either the questions you asked, or the answers I provided.