Turnip, I think Spam can defend himself well enough if he would want to
. I have no problem people asking questions. But his remarks came from strong scepticism. You can tell this from his remark "But if hydrogen works for you, good luck.". That's not simply asking a questions. And yes, this is adressed to the poster.
OK, now, back on topic because I don't want to get in discussions. I just want to share and retrieve information over here.