No matter how bad a person is even if he sims avoda zara it’s never too late to do teshuva. King menashe and a chef sinned the worst FOR 30 YEARS AND at the end of their life did teshuva WHOLEHEARTEDLY and it was accepted because they really meant it.
Klal yisroel today as a nation can still do teshuva and stop the tzaros from continuing if they WHOLEHEARTEDLY do teshuva together as a nation begging Hashem forgiveness and return to Achdus and ahavas yisroel