Yes, I agree with the basic sentiment of the article that all religions are not facets of one and the same - though I do think that statement in itself is overly simplistic. I believe that all religion is seeking meaningfulness and relationship with that sense of “otherness” so in that sense we are all trying to head the same way, but not that all paths will eventually converge (or ought to be trying to). I also agree with Joxy that unless we truly listen to and care about our differences we are stuck in our own little boxes and in real danger of patronising or otherwise harming other people in our ignorance. That’s one of the many reasons why, even if I don’t always post, I value the range of perspectives on this forum - and hope that others feel they are able to express their faith without being jumped on or corrected. 
Three things that leap out at me though… Firstly, compassion as the central theme in all religion does NOT make sense. This could be rather insulting to many theistic beliefs, which would mostly state that care of others comes out of obedience to or love of their deity, to sideline God (or YWH or Allah) as a byline to the more important message would be highly distasteful to those believers.
Second, actually, I won’t go with love and compassion being divided up so neatly.
Love could be love of others or of a god or of the world, or whatever, wheras compassion is soley love of other people, but I’m with CSLewis in believing compassion (or pure Charity) as an important facet of love. Compassion, surely, is love for no other sake but that of the other person. Saying it’s not as important as love, as the author is in danger of doing, misses that compassion IS love. Just not ALL of love.
Lastly, of course being pedantic, I am not going to let this one past without comment LOL.
“Christians use the techniques of faith and good works, and Christian exemplars are saints or ordinary people of faith.”
This is falling into the stated trap of viewing all faiths as the same, of course, as it is a description of what SOME Catholics believe, and not at all even the majority of Catholics. For the record, were it needed, Christians don’t believe that faith buys you salvation; the means of salvation is soley grace through faith - and although Catholic “optional extra” exemplars are saints, the major exemplar would of course be Jesus.
I told you I was being pedantic - still I think it’s an important difference - not all Christians are Catholics, not all Christians (or all Catholics) believe the exact same things. Similarly, not all Pagans live to the same creed or believe in the same spiritual truths, and I would be as quick to point out a statement implying that Paganism could be as neatly boxed.