Is waging jihad unislamic?
Is killing munafiq or destroying their masjid unislamic?
Is killing those who support kufr US unislamic?
Is fighting for Sharia unislamic?
Yes and no, Islamic code seems like a license to kill for those who deliberately misinterpret it.
However you have to do some research and be free of malice towards Islam, then it all seems very logical and principled.
The term Jihad is used for struggle and can be anything from betterment of society to standing up for justice, however standing up does not mean a military struggle...term of Jihad is now being used by the extremists to deviate the Muslims from their true path of tolerance.
The Muslims of old honored most the men of virtue and mercy.
Any noble cause can be Jihad as per its definition but the extremists only focus on the military aspect and in this they also completely distort the preconditions of initiating a Jihad.
Military Jihad is only one type and is aimed at fighting those who either
A) attack the Muslims
B) stop the message of Islam for being delivered at all.
C) persecute Muslims for following their religion
The message of Islam is being delivered all over the world and very few places are Muslims persecuted for following their religion so in these two categories even USA cannot be labeled as legitimate target and so too Pakistan.
As far attacking the Muslims is concerned the PA has not directly attacked Muslims for being Muslims so that too does not legitimize any so called Jihad against Pakistan.
Munafiq were those who overtly became Muslims but were secretly plotting the downfall of the Prophet Muhammad PBUH.
A Munafiq can usually not be defined by the current lot of Muslims since we have no divine connection by which to judge what is in the hearts of men.
The Prophet Muhammad PBUH was the messenger of Allah and so onto him were revealed the secrets and the hidden truth which cannot be conveyed to us, by virtue of his being a messenger of Allah the Prophet was made aware of this dangerous group which was polluting a pure society and was warned by Allah to be watchful of this lot.
Clearly there cannot be similar surity these days if a person stands up and accuses someone of being Munafiq.
Therefore if a person is to say that he is a Muslim and he offers the Kalma and believes in the oneness of Allah...there is no other major benchmark by which i can call him a Munafiq.
Any deviation on the other matters by such a person can be called failing to meet his duties as a Muslim but to say that he is a Munafiq is actually an accusation at his intention and therefore is not a very easy thing to do in the court or society.
For ease of definition a Munafiq is one who claims to be a true Muslim but in his heart he does not believe in Islam, clearly not something to judge for the likes of us till the Muslim in question openly says that he does not believe in Allah and is just being a Muslim to deceive others...
Regarding Kafir there are many complications here as well.
Usually the Kaffir term has been used for those people amongst whom the Messenger of Allah was present and they openly rejected his calls to heed the word of Allah, the verses in Quran referring to the treachery of the christian and Jews are actually very specific to the time when there were several tribes of Jews and Christians who were secretly plotting to break away from the pacts in which they had entered with the Prophet PBUH and were negotiating such an arrangement with the severely anti Muslim group in control of Mecca.
So in truth a Kaffir is the one who rejects the truth and whereas certainly the man who openly opposed the Prophet Muhammad PBUH is a Kaffir because before him stood the word of Allah and he deliberately opposed it, same logic cannot be applied to non Muslims today.
Also if we come to the people of the book, even then they were recognized as those closer to the Muslims than those who were Pagans etc.
This is a very logical explanation of Kaffir because as a community the Muslims can freely interact with the Christian and Jews and even intermarry.
One of the major reasons the marriage has been restricted to those of non Muslims women and not men is because Islam legally guaranteed many rights and inheritance to the women which was not the case in Arabia or nearly all of the world in those days.
Leave it to the ignorance of the few to cloud one of the most enlightened ways of life and try to twist it into something else for personal gains.
The guidance of the first Caliph of Islam based on what he learned from the Prophet Muhammad PBUH as to the manner of military Jihad is quite clear and is based on values of the highest order...
"Stop, O people, that I may give you ten rules for your guidance in the battlefield. Do not commit treachery or deviate from the right path. You must not mutilate dead bodies. Neither kill a child, nor a woman, nor an aged man. Bring no harm to the trees, nor burn them with fire, especially those which are fruitful. Slay not any of the enemy's flock, save for your food. You are likely to pass by people who have devoted their lives to monastic services; leave them alone."