Being sectarian is not practicing your school of Buddhism exclusively. Being sectarian is denegrading other sects and discouraging others from joining.
Tsongkapa's view of Madhyamika may be very quick to gain attainments, perhaps faster than others, but that does not mean other views cannot gain you the attainments of emptiness. It's a matter of applicability according to time, place and presentation of the teachings in accordance with the karmic disposition of the individuals.
Thank you Thaimonk for this post.
My sect is THE BEST, it really is THE BEST.
I can say that without being sectarian. Why? because when I say it is the best, it does not mean that it is the best for everyone at this point of time.
If I was to think that a sect is the best in the absolute, it would be revealing a mind of duality seeing a set of teachings as an independent object that can be compared with other sets of teachings separately independent and "existing" on their own and then comparing them as distinct objects. That is a wrong view, for nothing exists that way. Nothing.
A set of teaching, or a sect is relevant to beings according to the karmic disposition of the individuals, as Thaimonk explained, and it ceases to exist as it is perceived if the perceiver's karma changes.
So I say, my sect IS THE BEST. This is not derogatory at all. I think this to myself, for if it is not the best, then what i am doing here?
I do not say to OTHERS, my sect is THE BEST with the mindset of putting their sect down and feeling SUPERIOR... If I say this, if I think like this, then obviously I have not practiced well, and I prove that "MY" sect is not the best...
Maybe later, this life, next life, another set of teachings would be THE BEST for me, it is not contradictory.
If more could understand this, there would not be anymore inter-faith conflict. There could not possibly be conflicts between religions, between sects or sets of teachings. There would be more respect and tolerance, and understanding and harmony.