Famous Hanafi and Shafai Sufi Aalim Shahabuddin Aalusi رحمہ اللہ said:
وقد قلت يوما لرجل يستغيث في شدة ببعض الأموات وينادي يا فلان أغثني فقلت له: قل يا الله فقد قال سبحانه:
One day a person was invoking a "dead" for help saying, "Ya Fulan, Help me" and I said to him "Invoke Allah (ask Allah for Help)" because Allah himself said in Quran,
وَاذَا سَاَلَکَ عِبَادِیۡ عَنِّیۡ فَاِنِّیۡ قَرِیۡبٌ ؕ اُجِیۡبُ دَعۡوَۃَ الدَّاعِ اِذَا دَعَانِ.
"And when My servants ask you about Me, surely I am near. Whenever the caller calls on Me, I answer his dua (prayer)." (Surat al Baqara: 186)
فغضب وبلغني أنه قال: فلان منكر على الأولياء.
After hearing this the person got angry and then I heard that he's saying about me that So and So is the Munkir of Awliya.
📚 (روح المعاني في تفسير القرآن العظيم و سبع المثاني : ١٢/ ٢٦٦)
Via Hafiz Mohammad Tahir
It shows when you ask the people of shirk to rely upon Allah, they will label you munkireen e awliya just like Barelvis and other sects do when you up upright them regarding tawheed.