Yep, they are terrorist. And, yes, they did. Read the piece in Guardian or elsewhere, location where bus was blown up is more than 15 kilometres away from the closest Ukrainian forces location. Max distance of mortar - 10km.
There's a military base in use by rebels just 500m from the site of the attack. It looks like the Ukrainian military or the volunteer battalions missed their target. But I'm not here to convince you of anything, seeing as you've already made up your mind.
I repeat. If it would "Grad" or "Uragan" it would left much more destruction. So it was mortar, which max shooting distance is 10km. If you measure on Google Maps or elsewhere distance from Ukrainian forces position to the blast site it would be around 15 km.
I would listen if you provide real argument, not just russian-zombie-tv-shit.
Artillery unit which is more capable would left much destruction. So with no doubt shot was made in 10km radius. This territory is under control of terrorists
Why would they do it? To provoke hate to Ukrainian forces.