In answer to some of the above Rod:
1. It was a war situation and MH17 for some reason was allowed to fly above a battle zone when other airlines went around it. So it was a terrible accident that should never have transpired, but it did. Who was responsible? Probably Russia. But who can do what about that?
2. The 'Russian' mercenaries you mention are NOT recognised as being part of the Russian forces, and are disowned by President Putin. Like British or American mercenaries working in war zones they are not adopted by their home countries and are disowned accordingly. So what is the difference, apart from the propaganda?
3. Russian aircraft regularly fly close to British and American aircraft over Britain, as do RAF and USAF aircraft, including spying drones fly close to Russian planes and over their terroritry. So, what is the difference apart from we are Westerners and will always be in favour of what our forces do, as indeed the Russians will favour their forces?
4. Yes that is all very worrying and dangerous, but what should the West do? The West invented the bloody nuclear weapons, so now we live with other nations acquiring them. Apart from the very war none of us can want, what does the West do?
5. Yes, Putin is always going to still be, under his clokes of a "new modern democratic Russian" ( those who believe that really are deluding themselves) a true Soviet KGB officer who believes in manipulation of the masses as Stalin did. Yes, he is very dangerous, but thank God not a Hitler; he is not a manic destroyer of people who will gamble and chance his way with thousands of tanks crossing national borders, with millions of ground troops, whilst World powers decide on what to do with no military back up. No, the USA and the other NATO forces will react to stop any further terratorial advances by Putin towards the West. But, then we have to be prepared for war, and yes, in war as Hitler well proved, miscalculations will happen, and like the later Putin may well find his miscalculations fatal.
The coming years are going to be very testing for all. Just pray to whatever God you believe in that we will be spared. The end could be very quick, but we have been here before.