I think some people can do some extreme things out of love... I think the intention which caused them to do some of these extreme things is admirable and would not be spurned by our Lord... but our Lord never instructed them to do some of these extreme things IMO and I think St Francis de Sales for example was right to counsel against it in the case of St Francis Jane de Chantal that you mention.

God Bless

That is certainly one possible interpretation.  It doesn't seem to be the one traditionally held: as j mentioned, in their lives and the explanations of most priests, these acts are considered to have been special inspirations directly from God.  
The trouble it seems with your view is in comparing these acts with those of Origen and his followers who mutilated their members through a misinterpretation of Christ's words concerning eunuchs... these people certainly had the intention of glorifying God with these acts of mutilation, yet they were explicitly condemned (Origen by name at an ecuмenical council) for having committed the acts regardless.  Also, if these acts were not inspired by God yet they performed them anyway out of misguided zeal, then they were spiritually deluded and following demonic inspirations rather than Divine... yet are put forth as examples to follow: Saints.  These are not treated as acts for which repentance was needed or warranted.

If we follow the more traditional view, however, we directly ascribe to the Holy Ghost (the spirit of Truth, the Comforter, the Spirit of Peace...) the inspiration to mutilate the flesh and torture oneself in His Name.   In Frances of Rome's case, she was doing so to make a holy act (union within marriage) painful and distasteful.  This is also very difficult to support.
This is why I said "make of these facts what you will."  It is not an easy dilemma.