I can't get logic on attacks on random people. Just can't.
Police station\military base? Logical target. Governmental institutions? Logical target
Economic infrastructure? Logical target. High profile politicians? Very logical target. Random people in a bus\school\metro. WTF?
I know, it's terrible but it happens practically every time. It's like the militants are always blinded by the desire to make an impact that they end up attacking people weaker and more vulnerable than them, regardless of whether they're an important target or not. They become monsters.
The source of "Chechen Terrorism" was originally Shamil Basayev, a self-styled Chechen Che Guevara, the man responsible for causing the second Chechen war when his independent Islamic extremist brigade invaded Russian territory. During the second war he started saying that Chechens needed to make Russia feel what Chechens felt every day, so that's why they started doing horrible shit like Beslan and the Moscow apartment bombings. I've seen interviews with Chechen combatants who disagreed with the attack on the school, but always say "Beslan happened every day in Chechnya, yet the international community didn't care". That was their ethos.
In some respects Basayev is actually the man who deprived Chechnya of its independence. He started the second war, he started the terrorism, he was the main force that radicalised Chechnya as an Islamic movement. He's dead now of course, Russians killed him in a surgical strike that was a very long time coming. I see him as the Chechen Bonnie Prince Charlie; charismatic, but so far up his own arse with his arrogance and delusions of grandeur that he dragged his entire movement into irreversible failure.
That's because this is terrorism (the word being used correctly, for once). The idea is that you bring the horrors of conflict directly to civilians, and try to convince the power structure to give in by making the entire population scared for their lives.
The one thing these militants should have learned from the last decade of the War on Terror is that when genuine terrorism is used, countries simply do not back down. Instead what happens is the entire International Community will shove their feet up your ass with such force that political solutions will look much, much more inviting.