Shaykh Mawlana Karamat Ali Jaunpuri  (Allah have mercy on him) [d.1290H/1873CE] said,

‘The calamities resulting from being in the company of an innovator (bid’ati) surpass those of being with the infidel (kuffar).

The worst factions among the innovators are those who have hatred for the blessed Companions of the Holy Prophet (blessings and peace from Allah be upon him).’

Irshad us Slaikeen,page 20