Discussing relaxed violin playing versus playing with greater tension... Baroque performance on a modern instrument

Jaap Schroder writes in his book: Bach's solo violin works - a performer's guide:

" Only flexibility in the bow arm can produce the relaxation of the left hand that is essential in baroque music.  Since the player's arms are naturally connected, freedom of movement on one side can and should be contagious and spread through the body.  From this perspective, the use of a baroque bow will be of immense benefit to the player.  It should have priority over switching to a lower pitch or acquiring gut strings.  The old bow, by its natural way of speaking and dancing, will teach the left hand how to behave."

As this is a section within his book, it may be hard to lift it out of its context.  I am intrigued with this however.  I feel it this way, in my experience.  Jaap Schroder (his name is with dots on the o) in this part of the book discusses the use of vibrato as an ornament and in a relaxed and controlled use.

I have come across a strong opinion among other violinists, that one plays baroque music in a modern style: since we use modern instruments, longer and heavier bows and since we do not use the old baroque instruments and the old tuning.  It is my personal experience that this is - I guess they say - hog wash - as I find one can play baroque music in a relaxed way on a modern pitched and set up instrument, according to the proposed manner by Jaap Schroder.  Using a baroque bow is infinitely helpful.  Its light weight and build facilitates fast, light performance of passages - rhythmic and filled with expression fitting the music.  Using a modern bow, holding the bow a bit higher up on the bow allows for a similar effect.
I believe one can play baroque style on a modern instrument just fine and I have done so for many years.  The music comes to life using a baroque-style approach - even on a modern instrument.