This is primarily to make it difficult to oppose Erdogan. Earlier, an opposition would mean - jail time and potential release sometime in the future. Now, an opposition would mean - you have to sacrifice your life. Basically, the government has upped the stakes against dissent.
I'm less sure of this but I don't believe they lifted immunity for all MPs, I think the bill listed the exact MPs they were going to target.
After all when they label political opposition as terrorists and dissent and then somehow use this as a tool to remove political opposition and control education, is that going to end well democracy wise one seriously wonders.
The best argument for the death penalty is about legitimacy of the government. Given the choice between revenge killings and the death penalty sentence in fair courts, we should choose the death penalty. Of course, this presumes fair trials, etc., so if the trials themselves are non-existent or unfair, the calculus changes. And if the impulse for violent revenge does not exist among a people, then the calculus changes as well.
To be clear, the argument isn't that repaying murder with death is just. The argument is that to maintain a stable government, the government needs to respect popular opinion on the issue.
All that being said, I don't have any particular insight into Erdogan's changes. But changing rules just after a traumatic event can lead to regrets and overreach, as the U.S. found post 9/11.
Another pro-death penalty argument is its deterrent effect. While criminologists found that murder may not be deterred by the death penalty, we would expect other crimes requiring more deliberation and intelligence, to be deterred by the prospect of state killing. There is scope for innovative and beneficial use of the death penalty. For example, serious white collar crime, political corruption, and to enforce anti-discrimination laws.
The UK public until very recently had decisive majority support for the reintroduction of the death penalty. Last year the NatCen British Social Attitudes Report found 48% of the 2,878 people it surveyed were in favour of capital punishment. This is the lowest figure since the survey began in 1983, when around 75% of people were in favour. Capital punishment for murder was abolished in Great Britain in 1965.
Germany: http://www.welt.de/politik/deutschland/article134799279/
USA: http://www.people-press.org/2015/04/16/less-support-for-deat...
If you look at the actual legal outcome of the financial crisis, Goldman Sachs cooking of Greece books, Euribor Fraud, revolving doors between government a sweet consulting jobs, Panama papers, recurrent "tax" amnesty, ... it seems there is very little in common between what people think is illegal and what actually is. So what kind of deterrent would introducing death penalty actually achieve ? The fall guys would fall harder ?
The point is that the severity of the punishment must match the severity of the crime. Crooked people getting off easy is a different example of the same issue. In both cases, the legitimacy of the government is eroded. Sometimes this looks like people ignoring even more laws or voting for candidates that ignore the existing checks and balances. In more volatile cases, you could see the rise of tribal forces (including mafia and gangs), more revenge and honor killings, a full-on coup, or any number of other things.
Besides, life in prison is a harsher punishment than death.
I'm sorry, WHAT?! You seem to have a gross misunderstanding about the permanency of death.
Do you have evidence to back that up?
Or how about this. The vast majority of people who are being charged with the death penalty in the court of law, try to prevent that sentence from happening.
If everyone prefers the death penalty, then why would they use their lawyers to sue and prevent it from happening?
Why plea bargain down to life if you prefer death penalty.
Life with the possibility of parole, i.e. you still have a chance to live a free life, no matter how small and short. There are few if any cases of someone trying to bargain down to life without parole.
You do realize that you aren't executed right after the guilty plea, right? In capital cases many levels of appeals are mandatory and a death row inmate waits an average of 15 years before they're executed. In California, which has the largest death row population, no one has even been executed in a decade and there are no plans to so in many places it's a de facto life without parole sentence anyway.
[1] http://www.kesq.com/D-A-Approves-Duncan-Plea-Deal-Life-In-Pr...
[2] http://www.aol.com/article/2016/04/23/cody-rackemann-receive...
[3] http://articles.philly.com/2016-01-14/news/69738739_1_mackie...
[4] http://www.tulsaworld.com/news/courts/plea-deal-in-hicks-par...
[5] http://www.cleveland.com/metro/index.ssf/2013/07/ariel_castr...
Sadly, hardly anyone was indicted, so there's no point (yet) to debating the usefulness of the death penalty for white collar crimes.
Your position is unsupported by facts and unsustainable.
But of course politically it would make any deals with Erdogan more difficult.
I'm waiting for reactions on how long you can sell cars made in Turkey in the EU market (e.g. Toyota, Renault).