Should Mossad carry out extrajudicial killings?

An extra-judicial killing could be seen as a surgical solution to a particular troublesome individual, and certainly less evil than military operations against neighbourhoods suspected of containing 'terrorists'. 
 
Although I would have thought it would have been more useful to have kidnapped the individual and held him to ransom.

Carrying out killings on foreign territory without the approval of the government of that territory is unlikely to be viewed sympathetically - particularly if that country's citizens are put at risk as a result (e.g. due to the method or location of the attack or due to the use of forged documents that implicate innocent people).

Leaving aside any moral implications from that, such actions are likely to produce negative publicity and negative diplomatic reactions from other states. Israel's public reputation is likely to be harmed by the impression given by such actions that Israel is willing to endanger foreign civilians to achieve its goals - and in countries used to the rule of law, that they are prepared to assassinate individuals rather than engage in a judicial process. Extrajudicial killings may therefore cause more harm to Israel's interests than good.