“A person can become TAMEI. He can also be a source of further TUMAH, but he is not TUMAH.”
There is an interesting issue at play here, namely that of semantics and misuse of language. We see that often in the CR, and elsewhere everytime some refers to an object as a tznius this or that. The word tznius means one thing – modesty. You cannot have a modesty person (i.e. she is not tznius), but you can have an item that is tzanua (she is a tznuah or tzniusDIG person). This happens to be a pet peeve of mine, and I know it is a naarishkeit that this bothers me as much as it does, butthe truth is I see the same thing in the tumah reference. People are not tumah. TUMAH is Tumah. People can be a source for it (if dead), but they are not intrinsically “tumah.” AS the Torah teaches us over and over again, each word has a meaning, and the use of words should always be very clear, precise, and correct. Changing a word or using it grammatically incorrectly can change the meaning of a posuk completely. It also tends to be the product of exaggeration when we see it here, such as in the reference to tumah.