It's not a matter of morality, he just seemed like the sort of asset that would be more useful to them alive than dead especially since nothing much of significance seems to have even come from his death when it could have been used as an opportunity for many things.

Even the messages in question have a tone of confusion as to why the jewish donors were pulling out and that was the only reason he even considered dropping support for Israel and jews as part of his platform. which while a sign of him having outlived his usefulness doesn't really explain what the plan going forward would be when everything seems to be moving in the same direction it would have had the money kept flowing.

I don't even think he was a politician or made any claims of wanting to become one did he? I thought his whole think was to serve more as a political funnel to the chosen candidate, was he attempting to stray from that role he was assigned or is it just speculation?