You should leave the place and make your Athkar away from them so that people wouldn’t think you are one of them.

In subcontinent,it’s seen in various mosques innovations taking place right after tasleem like congregational dua’ etc.We know that when we see any evil taking place,we must protest that,so,regarding such innovations,if we do adhkar after solah by sitting in our prayer place with them doing such bidah in the masjid and we don’t protest that in any way ,thus,are we sinful?