Same here. The FBI (deliberately, IMO) left many questions answered (or obfuscated) that McVeigh could have enlightened us on. But, then, perhaps that's the reason for the rushed "execution"...
That was my first tip-off. Why all the rush?
Look, I don’t like what he did at all, and I think he should have paid by being locked in prison for his whole life.
I too thought it was important whether he had an Islamic connection, which at that time would not have rung alarm bells like it would now.
By killing him, we allowed others to get off. I don’t like that at all!