they explain it by a design. they was in the genome since the beginning.
No, that's just another claim.
again: just a belief. you cant change this fact.
It's not a belief. It's a fact. An observable, repeatable, verifiable fact.
again: if they are the product of design ,we can explain it by a common similarity becuase of a common designer.
And if they are magical, we can explain it by a common enchantment.
Such "what if" statements are rather meaningless.
Now... if we simply don't
assume the answers and rather just go by the evidence and the observable processes, then explaining shared ERV's is as trivial as explaining why siblings are genetically more alike then non-siblings.
since you cant prove they arent the product of design
You can't prove they aren't the product of enchantments either.
Classic shift of the burden of proof.
If you wish to claim design, then upto you to support it. And your supportive argument can't start with the hidden assumption that they are in fact designed, like you did in the previous paragraphe with your rather silly "what if" statement.
, you can only believe they arent
False.
I just don't accept the claim of design, because there is not evidence for it.
Rejecting a claim is not the same as accepting the opposite claim.
I accept evolution theory, based on the evidence.
I have no reasons to assume that there was some kind of "guider" or "designer" necessary for this process. No, I can't exclude it. Just like I can't exclude pink graviton fairies.
But, off course, what one can't
exclude isn't interesting or meaningfull. What matter is what you
can include. Emphasis on the word "can". "can" meaning: with evidence - not just through belief claims.
you also forgot that even if they are indeed a product of viral insertion- we can explain it by the claim that most of the genome is functional.
There is absolutely no reason why things that are inserted in the genome, can't take up any function within the system.
Another display of your ignorance on this matter.