You have contributed 0.0% of this topic
Both of the answers given to you are good but incomplete.
The fact of the matter is that Rabbis who certify Kosher bless the knife or the location and not every single animal (in my two decades of experience in US and UK).
You can visit a Kosher abattoir and easily observe this procedure.
This may comply with Jewish procedures but does not comply with Islam because Dhabiha/Kosher needs to be done on each and every animal.
Orthodox Jews disagree with this practise and deem the meat to be impermissable and regularly warn against consuming it.
"Kosher" is hard to find even in Israel as I was told by leading Rabbis.
Thus "Kosher" isn't really "Kosher" in our times majority of the time.
When you are dealing with Arabs (worldwide) and American Muslims, the argument should be framed as follows.
They will likely lose the intellectual argument but keep on consuming Haram because it is matter of Taqwa and not a matter of argument, you can soundly defeat people on this issue in next to no time.
Very few of those who consume Haram are actually well read on the subject, they mostly do it for convenience
This is just my opinion and everyone is free to disagree
This cannot be undone and I am sure it will be greatly appreciated.