The only true popular front! /s

If you’re intending to be sarcastic, you probably mean united front.

Looking at the definition I see united front actually fits the idea better! I did mean to be sarcastic and wrong though.

Ha!

Blending of conflicting ideologies implies compromise or trade-off, which would be a popular front.

In a united front, the groups do not merge or compromise. Ideologies and ultimate intentions remain pure, and the groups only collaborate in the name of overlapping interests.

These days as long as you promise financial benefits for about 10-30% of population, anything goes. That's why you've got so many populist parties around Europe winning elections. People don't care much as long as they get paid, can buy food, pay rent, and spend rest of the day browsing internet or getting drunk in front of Netflix.