Mostly, I just wanted to expose that the GB/FD$/WTBT$ take on the "no part of the world" verse is misapplied.
As regards voting, where I live people don't just vote for elected officials. Decisions on finances for public works projects, like building bridges, are sometimes decided by referendum, as well as amendments to the state constitution regarding things like allowing persons with disabilities to sign petitions and so on.
Since Jesus did not take the throne in the first century nor in 1914, none of the governments from that time until now have been ruling in opposition to Christ's Kingdom, so anybody who votes for an official running for office has not been acting against the Kingdom. The first century Christians were not opposed to voting. They were opposed to doing an act of worship to the emperor.
"That means that by voting, whether you like or accept it or not, you are endorsing all that that party stands for, against its rivals. You bear a share of responsibility for what it does (both good and evil) if it comes to power."
I do not agree. If the government demands a person select a party, it is not an endorsement to comply with those wishes, it is compliance.
To illustrate, in the congregations, the members are told to vote for the officers of the local corporation. If all the congregation members vote unanimously for "Brother Bob" to be director, but then later he steals from the contribution box while in that elected role, are all of the congregation members culpable for his theft because of voting for him to be the director? The congregation authorities told the members to vote, and told them who to vote for, so they did it. They do not bear responsibility for what he does. He bears the responsibility.
God has allowed these nations to have their governments at present. Some of them utilize the process of voting and elections. Romans 13:7 "Render to all their dues: to the one who calls for the tax, the tax; to the one who calls for the tribute, the tribute; to the one who calls for fear, such fear; to the one who calls for honor, such honor." If the "tribute" is acceptance of a government mandated political party card, then it is not in opposition to God's will to accept that card.
I personally do not vote and have no desire to, but I do not see anywhere in the Bible that prohibits it.
Also, nowhere in the Bible does it say that Christians are prohibited from killing others. (Obviously murder is wrong, but in context here we are talking about Cornelius and the military.) Jesus said whoever lives by the sword will die by the sword, which implies that living by the sword is dangerous. Jesus told Peter to put down the sword in that instance at Gethsemane because he knew God's will included getting arrested at that time and killed. But the account where Jesus poured out holy spirit on Cornelius, again, shows that Christians could serve in the military without it being a breach of Christian standards. Cornelius wasn't a traffic cop - he was a centurion.
My grandfather was in the Navy in WWII, at Normandy. My great uncles were in the Army, one a POW in Germany. My dad was an army veteran; my step-dad a retired lieutenant colonel; my step-brother 716th Military Police Battalion, 101st Airborne Division (Air Assault) died in Iraq; my nephew is in the Air Force; another step-brother and my cousin are police officers. I was not and am not afraid of any of them. They were not and are not scary mean people.
On the other hand, I have been afraid of some of those in the local congregations at times. Some of those people have been scary and mean to me or threatening to my children, in a way that made me call the police at times and other times go to the courts for protection. I have found that being in the military or not is not what makes a person violent or have the spirit of the world. The spirit of the world (selfishness, greed, love of violence, etc) can be found in people who outwardly claim to be the most religious people around, while some who have the assignment as executioners are peaceable by nature.
Notice what Jesus said about killing...
Mark 3:4
"Next he said to them: “Is it lawful on the Sabbath to do good or to do harm, to save a life or to kill?”"
Jesus is Lord of the Sabbath. (Mark 2:28) Jehovah has assigned Jesus to carry out executions at the end of the tribulation. Those executions are not in violation of Christian standards. Jesus is the Christ, the Prince of Peace. He never violates Christian standards - he's the one who sets the example for Christians, and his example shows that sometimes it is lawful on the Sabbath "to do good or to do harm, to save a life or to kill".
I am not saying people should go sign up for the military. I hate killing. I won't even watch cartoons where characters get hit in the head. We must hate what is bad. Jehovah hates violence. We must also hate violence, and intrigue and slander and so on. But it is not the label on the outside of the cup that determines whether a person loves or hates violence. It is what is on the inside that counts, that leads to either good or rotten fruit. Jesus hates violence, and yet he's assigned as God's chief executioner.
There are men in military uniforms who are true Christians.
And there are men with "FDS" titles who are not.
John 13:35
"By this all will know that you are my disciples—if you have love among yourselves."
John 15:13
"No one has love greater than this, that someone should surrender his life in behalf of his friends."