Once I sorted out what was actually being asked, my first reaction was that the situation/opinion is really not that common among 'liberals'.

My 2nd reaction was that there are huge divides between what might be considered 'moral' and what might be 'convenient' or 'pragmatic'.
*I* personally dislike the idea of capital punishment, yet I see prisons with large numbers of 'expensive to maintain' inmates who will very likely never be allowed back in society, and who are daily problems and genuine dangers to guards & staff & other prisoners. I truly do NOT know how to resolve this quandary, as there ARE occasionally mistakes made in capital punishment.

As to other countries... I'm sure they have similar concerns albeit from different perspectives. I try very hard to apply the same basic, personal standards to all cases.