Does a non-Muslim wishing you a happy Eid become Muslim by virtue of doing so? 
No toor Nooooo...  that is not what  
"A Muslim"  says  and that is not what   
"a scary Muslim. Boo!"  says.,  what
 A Muslims said is  this 
I don't support that he was killed, but the original comment made by Asad Shah is quite controversial in Islam. We are not allowed to imitate the kuffar, so we cannot wish each other man-made and paganistic holidays and celebrations.
  and to such statements of A Muslim  add some  
"Quran verses  "  such as 
Al-Hadid  Verse 16:  Has not the Time arrived for the Believers that their hearts in all humility should engage in the remembrance of Allah and of the Truth which has been revealed (to them), and that they should not become like those to whom was given Revelation aforetime, but long ages passed over them and their hearts grew hard?  For many among them are rebellious transgressors . 
 Al Imran verse 85 :  And whoever desires a religion other than Islam, it shall not be accepted from him, and in the hereafter he shall be one of the losers. 
Al Imran verse 105 : And be not like those who became divided and disagreed after clear arguments had come to them, and these it is that shall have a grievous chastisement
And to that Quran add some 
"he said/she said/who said hadith"  such as  some Bukhari bullshit 
 Bukhari bullshit-1:
 Hazrat Abu Huzaifa (RA) narrates a Hadith concerning the leaders of the mischief makers saying  ‘I swear by Allah (SWT) that Prophet (ﷺ)  has not left out a single leader of Fitna from this day to the day of Qiyamah. Their followers would number 300 or more and further gave their names and that of their tribes.’ (Abu Dawood).
Bukhari bullshit-2  : 
Imam Bukhari (RA) has quoted this Hadith from Abdullah Ibn Umar (RA) that Prophet (ﷺ) once prayed for Syria and Yemen. It is narrated that there were some people of Najd also present in the gathering and they requested the Prophet (ﷺ) to make supplication (du’a) for Najd also. Prophet (ﷺ) continued saying:  ‘O! Allah, Shower Blessings on Syria and Yemen’.  The people of Najd again requested the Prophet (ﷺ) to offer prayers for Najd.  The Prophet (ﷺ) said:  ‘It is a place of tremor and mischief (Fitna) and the Horn of Shaitaan will rise from there.’  
Bukhari bullshit-3:  This Hadith is mentioned in Sahih Muslim.  Hazrat Abdullah bin Umar (RA) narrates that ‘ Prophet (ﷺ) once emerged from the room of Ummul Momineen Hazrata Ayesha Siddiqa (RA) and pointing towards East (Najd) exclaimed, ‘This is the center of Kufr from where the horn of Shaitaan will rise’.Some  other said bullshit Hadith -4: Allama al-Sayyid Ahmad Ibn Zayni  al-Dahlan (d – 1886 AD), Mufti of Makka and Shaikh al-Islam in Hijaz,   narrates an authentic Hadith in his book ‘Addarus Sunniah’, which he has quoted from Sihaah.  Prophet Mohammad (ﷺ) is reported to have said:  ‘There will rise a group of people in the East who will recite the Holy Quran, but alas, the Quran will not go beyond their throat. This group will keep rising till the Day of Judgment and they will eventually rise with Dajjal. Their main symbol will be (they will) sit in groups (Halqa).’ (Addarus Sunniah, P. 50)and add some more yadi..yada..yada
 FUCKING SHIT  from some idiots of Islam Hadith – 10 
Hadith – 11 
 Hadith – 12   
Hadith – 13  
Hadith – 14
Hadith – 15   
Hadith – 16  
Hadith – 17   
 what you end up with all that shit is
 Rogue preachers that breed Brutal rogues of Islam.   And consequences of that to the society is 
Killing of that 40 year old guy  and defending it  with so-called Islamic scriptures  also killing of Christians  or people of other faiths ..Such is the news published today..
 ISIS  Islamic hereos  killed 21 Christians in al-Qaryatain,  and that is today's news from BBC..