"He who joins the British Army, the American Army, he is a mortal kaffir and his only hukum (punishment) is for his head to be removed"

Abu Izzadeen is the character who challenged British sovereignty over a Muslim area of East London. Here he calls for the beheading of Muslims who join the British or American armies, and affirms that a Muslim who leaves Islam must be executed, in accord with Muhammad's command (Bukhari 9.84.57).
When I point out that Muhammad commanded the execution of apostates, I'm called an "Islamophobe." Is Abu Izzadeen an "Islamophobe"?
"Extremist video uncovered," from ITV News,

evidence of a leading Muslim extremist calling for the beheading of British Muslim soldiers has been uncovered.
A video of Abu Izzadeen, preaching his message of hate two years ago, has been discovered on an underground website.
In the video, he said: "Whoever allies himself with the Kaffirs (non-believers) against the believers - he is one of them.
"He who joins the British Army, the American Army, he is a mortal kaffir and his only hukum (punishment) is for his head to be removed.
"Indeed, whoever changes his deen (Muslim code of life); kill him."