While there was an armed ambush on the ICE facility in Alvarado, Texas, involving individuals charged with attempted murder and the recovery of a 'Resist Fascism' flag and flyers urging 'class war,' there is no credible evidence that the attackers were identified as Democrats or that exactly 12 individuals were charged.
12 Democrats have been charged with attempted murder after ambushing ICE in Alvarado, Texas. Armed with AR-style rifles, they waited to open fire. Authorities recovered a “Resist Fascism” flag and flyers urging “class war.”

FactVerify
Source: factverify.com
What the Evidence Shows
The claim states that 12 Democrats were charged with attempted murder after ambushing ICE in Alvarado, Texas, armed with AR-style rifles, and that authorities recovered a 'Resist Fascism' flag and flyers urging 'class war. ' The sources confirm that an organized ambush occurred at the ICE detention center in Alvarado, Texas, on July 4, involving armed individuals who opened fire and that several people were arrested and charged with attempted murder.
Flyers and a flag with slogans such as 'Resist Fascism, Fight Oligarchy' and calls for 'class war' were indeed recovered near the scene. However, the number of people charged varies between sources: some mention 10 individuals charged with attempted murder, others mention 11 or 12 charged in total. Importantly, none of the credible news sources (FOX4 Dallas-Fort Worth, NBC DFW, Fox San Antonio) identify the suspects as Democrats or link their political affiliation to the Democratic Party.
The label 'Democrats' appears primarily in less reliable or partisan sources and a YouTube video without authoritative backing. Therefore, while the attack and charges are factual, the political affiliation claim is unsubstantiated and likely misleading. The presence of AR-style rifles is not explicitly confirmed in the reliable sources but is plausible given the description of military gear.
Overall, the core facts about the attack and charges are true, but the claim that these individuals are Democrats is unsupported by credible evidence.