Glad you have posted this. Been given the "your going to hell if you ctb" speech from practicing Muslims, & whilst I am not relgious I will die as a Muslim in case Allah exists.
Have you seen this vid;
Somewhere in that lecture the guy destorys all those arguments Muslims use to scare you off CTB. Having thought about everything, I've realised religon is just an opinion at the end of the day, which no one can prove either way. So whatever you or I believe is just as valid as the most experienced Iman or preiest etc.
I tend to hold the same views as the guy in that lecture i.e. vets put animals down & that is seen as compassionate & emphatic in society. Also doctors are starting to put mentally ill people down in some countries & again for compassionate reasons.
https://www.bbc.co.uk/news/stories-45117163 Also CTb'ing is no longer illegal in the UK (whereas it used to be).
So considering all the above, why on earth is CTB'ing still consider a sin in Islam these days???