Hezbollah, who is allied with Iran and Syria, almost has full strangle hold on Lebanon The Christians used to be majority there and now they are minority. There are also Muslims allied up with the Christians in Lebanon to combat Hezbollah. Hezbollah is funded by Syria and Iran and I won't say who's funding the opposition :) Apparently not enough has been done because mujahadeen (Hezbollah) are nearly done taking over (unfortunately.) I still retain hope though that Lebanon can be reclaimed by the natives and fend off the hostile extremists.
Iran, who has declared they want to conquer "all the mountaintops of the world" also has their hands in Sudan. Bashir and Achmedinejad are allies and they are trying to rule over the natives with extremist Shariah law. You see people starving and fleeing into Chad. There is also opposition to this war from another Muslim entity that is also fighting Iran, but Bashir is so far winning because all the West has mainly done is "condemn it!" and declare Bashir subject to arrest in violation of international law while the Iranians decried the Hague conviction as "unjust!" there really is nothing to stop Bashir from doing his dirty deeds.
In Yemen, Kuwait, Egypt, Bahrain and Jordan one can also see the Iranian footprint. They are funding extremism within those countries to make a larger foothold in the greater Muslim world. Iranians are Persian Muslims and separate from the greater Muslim Arab Sunni world. Iranians have a shiite.violent end times prophecy that they are trying to make come true and they use extremist means to try to get end result. They do get some sunni collaborators but they mainly have opposition from Sunni.
Iran has their hands in the Gaza strip along with Syria. Syria wants their former territory back (ancient Greater Syrian Empire from a 2,000+ year old map) and Iran's stake is to upset the status quo of the Middle East using the Palestinians as pawns in their game of global hegemony to inflame the Muslim and Western world and get their great Mahdi Army going, to gain momentum, sweep across regions and wipe out all opposition. Israel is of course fending them off.
The Taliban, who largely shares the Iranian extremist strategy, has their foothold now in Pakistan, which is rather scary considering that is how Hezbollah got their foothold and now they nearly rule Lebanon, and this is the modus operandi that all the extremists share, "get foothold." Pakistan has nuclear capability and we don't want that to get in extremists hands, as there has already been a request for a nuclear suicide bomber amongst the extremists.
In Mexico you see the government in war with the drug cartels. The previous Mexican President, albeit a nice man, Vicente Fox, didn't do much to combat the drug trade. Now the new President, Felipe Calderon, has vowed to say no to the drug lords and has been battling it in the streets with them. The Mexican gov't will win but so far it's a bloody fight. Contrary to what the previous answerer said, Mexico is relatively safe as long as one stays away from the northern Mexican states, where most of the hostilities are taken out into the streets.
And then of course the European countries are fending off the new Muslim immigrants who are trying to exert their cultural control into Western domain. In Sweden, we saw "homemade" rockets and attacks on police cars, in Paris they shouted to riot police "get out of my occupied France!" in London they shouted "we are all Palestinians" and "I'm going to start a bloody war!" while the gov't denied Geert Wilders (another EU ally) from entering the country and nearly allowed a Hezbollah terrorist into the country, but later reconsidered on the terrorist.