Didn't convince me because you are ignoring the history of Islam and that's what strikes me the most in your post. You do not want the IS caliphate, so tell me which one would you prefer? Khilafah al 3abasiya? Umayyads? Did they not kill? No cutting hands? After the rasoul's death in 632 (peace be upon him), Abu Bakr launched Islam into almost 1400 years of continual bloody conquest and subjugation of kuffar through invasion and war. Anyone who says otherwise is picking and choosing from his religion and doing historical revisionism.
‘Alī Ibn Abī Tālib (radiyallāhu ‘anh) said, “Allah’s Messenger (sallallāhu ‘alayhi wa sallam) was sent with four swords: a sword for the mushrikīn, {And when the sacred months have passed, then kill the mushrikīn wherever you find them}
Allah (ta’ālā) also described what should be struck with the sword, {Remember when your Lord revealed to the angels, “I am with you, so strengthen those who have believed. I will cast terror into the hearts of those who disbelieved, so strike [them] upon the necks and strike from them every fingertip”} [Al-Anfāl: 12]. He (ta’ālā) also said, {So when you meet those who disbelieve, strike their necks until, when you have inflicted slaughter upon them, then secure their bonds, and either [confer] favor afterwards or ransom [them] until the war lays down its burdens} [Muhammad: 4]
[At-Tawbah: 5], a sword for Ahlul-Kitāb, {Fight those who do not believe in Allah or in the Last Day and who do not consider unlawful what Allah and His Messenger have made unlawful and who do not adopt the religion of truth from those who were given the Book – [fight them] until they give the jizyah willingly while they are humbled} [At-Tawbah: 29], a sword for the munāfiqīn, {O Prophet, fight against the kuffār and the munāfiqīn} [At-Tawbah: 73], and a sword for the bughāt (rebellious aggressors), {Then fight against the group that commits baghy (aggression) until it returns to the ordinance of Allah} [Al-Hujurāt: 9]” [Tafsīr Ibn Kathīr].
O you who have believed, do not take the Jews and the Christians as allies. They are [in fact] allies of one another. And whoever is an ally to them among you - then indeed, he is [one] of them. Indeed, Allah guides not the wrongdoing people. Surat Al-Mā'idah 5:51
Further I don't see a photo of people standing in a line as proving anything so I don't know where you want to go with that in proving IS is a caliphate or not. Because they had a food shortage?