Hi Chris, all.
I don't feel tension in modern Buddhism. However, i often feel tension within people. I think we are talking about the problematic behaviour of people here, rather than issues between differing schools. I think it's easy to use a school, a faith, a belief, a colour, a race etc, to hide behind, but really we are all responsible for how we treat people, and how we respond to the treatment we receive from others.
All of us here know what we are really talking about, in my honest opinion. At one time few options were available for the practicing Buddhist who wished to share their experiences with, and learn from other practicng Buddhists online. Now we have many options, this lovely site included, moderated with compassion and equanimity, that we can visit and share with others.
Their will be times, even on this site when people will have the liberty of posting removed for whatever reason, and lines will be drawn and people will be upset. I know this from my own (limited) experience as a mod.
A compassionate community needs rules. How those rules are made, and how they are carried out is the mark of the compassion and wisdom of those who make and enforce them.
So again, it all comes back to people. Buddhism, like so many other things, makes a fine excuse for a lot of selfish action, but ultimately our intention is our own, and the karma it generates is ours to live through.
Maybe we can learn from some of this stuff and make this as suportive a community as i think it can be, judging by the high regard that i hold for those who started it, and moderate it. Perhaps we can own our words and deeds without using our faith and our beliefs to justify our actions and intentions.
Just some thoughts.