[Dave S]

Therpeutic cloning is cannibalistic, and it kills an individual human life in order to aid another, older life, to sustain that older life ... it is cannibalism.

Last century, or perhaps even now, you would have been violently opposed to blood transfusion or organ transplantation for the same reason.

[MHGinTN]

You are making the error of equating blood (a subunit of the organism) with the whole organism (as in an embryo is the organism, the whole person at the age of embryo).

... and(in vitro fertilization) the process redefined the earliest age of an individual’s lifetime as but one stage ‘in a process that eventually becomes a human being’. (That new definition arbitrarily chosen claimed the 'thing' eventually becomes a human being, but the prior truth had to be ignored in order to establish the new utilitarian definition.) The individual life begins at conception. The 'clock' of lifetime begins ticking at conception and each age of the individual is but an age along a continuum that is an individual's lifetime.

[freeangel]

A transfusion doesn't kill the donor, does it? And the donor also has a chance to give his consent.