Qantar’s family rejects these claims. I could not find what Qantar himself says about it.
http://news.yahoo.com/s/nm/20080629/ts_nm/israel_lebanon_dc
Qantar’s family says the two probably died in cross-fire during the infiltration from the sea.
Besides, how does his “crime” compare with Zionist actions against Muslims? Do you want me to start?